diff --git a/apps/note/models/transactions.py b/apps/note/models/transactions.py
index 0e40edf6..c6b8baa6 100644
--- a/apps/note/models/transactions.py
+++ b/apps/note/models/transactions.py
@@ -2,6 +2,7 @@
 # SPDX-License-Identifier: GPL-3.0-or-later
 
 from django.db import models
+from django.db.models import F
 from django.urls import reverse
 from django.utils import timezone
 from django.utils.translation import gettext_lazy as _
@@ -93,12 +94,26 @@ class Transaction(PolymorphicModel):
         related_name='+',
         verbose_name=_('source'),
     )
+
+    source_alias = models.CharField(
+        max_length=255,
+        default="",  # Will be remplaced by the name of the note on save
+        verbose_name=_('used alias'),
+    )
+
     destination = models.ForeignKey(
         Note,
         on_delete=models.PROTECT,
         related_name='+',
         verbose_name=_('destination'),
     )
+
+    destination_alias = models.CharField(
+        max_length=255,
+        default="",  # Will be remplaced by the name of the note on save
+        verbose_name=_('used alias'),
+    )
+
     created_at = models.DateTimeField(
         verbose_name=_('created at'),
         default=timezone.now,
@@ -115,11 +130,19 @@ class Transaction(PolymorphicModel):
         verbose_name=_('reason'),
         max_length=255,
     )
+
     valid = models.BooleanField(
         verbose_name=_('valid'),
         default=True,
     )
 
+    invalidity_reason = models.CharField(
+        verbose_name=_('invalidity reason'),
+        max_length=255,
+        default=None,
+        null=True,
+    )
+
     class Meta:
         verbose_name = _("transaction")
         verbose_name_plural = _("transactions")
@@ -134,6 +157,13 @@ class Transaction(PolymorphicModel):
         When saving, also transfer money between two notes
         """
 
+        # If the aliases are not entered, we assume that the used alias is the name of the note
+        if not self.source_alias:
+            self.source_alias = str(self.source)
+
+        if not self.destination_alias:
+            self.destination_alias = str(self.destination)
+
         if self.source.pk == self.destination.pk:
             # When source == destination, no money is transfered
             super().save(*args, **kwargs)
@@ -152,6 +182,10 @@ class Transaction(PolymorphicModel):
             self.source.balance -= to_transfer
             self.destination.balance += to_transfer
 
+            # When a transaction is declared valid, we ensure that the invalidity reason is null, if it was
+            # previously invalid
+            self.invalidity_reason = None
+
         # We save first the transaction, in case of the user has no right to transfer money
         super().save(*args, **kwargs)
 
diff --git a/apps/note/tables.py b/apps/note/tables.py
index 20054d2c..4b57cfa2 100644
--- a/apps/note/tables.py
+++ b/apps/note/tables.py
@@ -5,6 +5,7 @@ import html
 
 import django_tables2 as tables
 from django.db.models import F
+from django.utils.html import format_html
 from django_tables2.utils import A
 from django.utils.translation import gettext_lazy as _
 
@@ -20,19 +21,48 @@ class HistoryTable(tables.Table):
                 'table table-condensed table-striped table-hover'
         }
         model = Transaction
-        exclude = ("id", "polymorphic_ctype", )
+        exclude = ("id", "polymorphic_ctype", "invalidity_reason", "source_alias", "destination_alias",)
         template_name = 'django_tables2/bootstrap4.html'
-        sequence = ('...', 'type', 'total', 'valid', )
+        sequence = ('...', 'type', 'total', 'valid',)
         orderable = False
 
+    source = tables.Column(
+        attrs={
+            "td": {
+                "data-toggle": "tooltip",
+                "title": lambda record: _("used alias").capitalize() + " : " + record.source_alias,
+            }
+        }
+    )
+
+    destination = tables.Column(
+        attrs={
+            "td": {
+                "data-toggle": "tooltip",
+                "title": lambda record: _("used alias").capitalize() + " : " + record.destination_alias,
+            }
+        }
+    )
+
     type = tables.Column()
 
     total = tables.Column()  # will use Transaction.total() !!
 
-    valid = tables.Column(attrs={"td": {"id": lambda record: "validate_" + str(record.id),
-                                        "class": lambda record: str(record.valid).lower() + ' validate',
-                                        "onclick": lambda record: 'de_validate(' + str(record.id) + ', '
-                                                                  + str(record.valid).lower() + ')'}})
+    valid = tables.Column(
+        attrs={
+            "td": {
+                "id": lambda record: "validate_" + str(record.id),
+                "class": lambda record: str(record.valid).lower() + ' validate',
+                "data-toggle": "tooltip",
+                "title": lambda record: _("Click to invalidate") if record.valid else _("Click to validate"),
+                "onclick": lambda record: 'in_validate(' + str(record.id) + ', ' + str(record.valid).lower() + ')',
+                "onmouseover": lambda record: '$("#invalidity_reason_'
+                                              + str(record.id) + '").show();$("#invalidity_reason_'
+                                              + str(record.id) + '").focus();',
+                "onmouseout": lambda record: '$("#invalidity_reason_' + str(record.id) + '").hide()',
+            }
+        }
+    )
 
     def order_total(self, queryset, is_descending):
         # needed for rendering
@@ -53,8 +83,18 @@ class HistoryTable(tables.Table):
     def render_reason(self, value):
         return html.unescape(value)
 
-    def render_valid(self, value):
-        return "✔" if value else "✖"
+    def render_valid(self, value, record):
+        """
+        When the validation status is hovered, an input field is displayed to let the user specify an invalidity reason
+        """
+        val = "✔" if value else "✖"
+        val += "<input type='text' class='form-control' id='invalidity_reason_" + str(record.id) \
+               + "' value='" + (html.escape(record.invalidity_reason)
+                                if record.invalidity_reason else ("" if value else str(_("No reason specified")))) \
+               + "'" + ("" if value else " disabled") \
+               + " placeholder='" + html.escape(_("invalidity reason").capitalize()) + "'" \
+               + " style='position: absolute; width: 15em; margin-left: -15.5em; margin-top: -2em; display: none;'>"
+        return format_html(val)
 
 
 # function delete_button(id) provided in template file
diff --git a/apps/permission/fixtures/initial.json b/apps/permission/fixtures/initial.json
index 4c7de16d..43d39a36 100644
--- a/apps/permission/fixtures/initial.json
+++ b/apps/permission/fixtures/initial.json
@@ -327,7 +327,7 @@
         "note",
         "transaction"
       ],
-      "query": "[\"AND\", {\"source\": [\"user\", \"note\"]}, {\"amount__lte\": [\"user\", \"note\", \"balance\"]}]",
+      "query": "[\"AND\", {\"source\": [\"user\", \"note\"]}, [\"OR\", {\"amount__lte\": [\"user\", \"note\", \"balance\"]}, {\"valid\": false}]]",
       "type": "add",
       "mask": 1,
       "field": "",
@@ -387,7 +387,7 @@
         "note",
         "recurrenttransaction"
       ],
-      "query": "[\"AND\", {\"destination\": [\"club\", \"note\"]}, {\"amount__lte\": {\"F\": [\"ADD\", [\"F\", \"source__balance\"], 5000]}}]",
+      "query": "[\"AND\", {\"destination\": [\"club\", \"note\"]}, [\"OR\", {\"amount__lte\": {\"F\": [\"ADD\", [\"F\", \"source__balance\"], 5000]}}, {\"valid\": false}]]",
       "type": "add",
       "mask": 2,
       "field": "",
diff --git a/locale/de/LC_MESSAGES/django.po b/locale/de/LC_MESSAGES/django.po
index b6a8c120..c9eda5aa 100644
--- a/locale/de/LC_MESSAGES/django.po
+++ b/locale/de/LC_MESSAGES/django.po
@@ -8,7 +8,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2020-03-24 15:49+0100\n"
+"POT-Creation-Date: 2020-03-26 14:40+0100\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -24,8 +24,8 @@ msgstr ""
 
 #: apps/activity/models.py:19 apps/activity/models.py:44
 #: apps/member/models.py:63 apps/member/models.py:114
-#: apps/note/models/notes.py:188 apps/note/models/transactions.py:24
-#: apps/note/models/transactions.py:44 apps/note/models/transactions.py:198
+#: apps/note/models/notes.py:188 apps/note/models/transactions.py:25
+#: apps/note/models/transactions.py:45 apps/note/models/transactions.py:232
 #: templates/member/profile_detail.html:15
 msgid "name"
 msgstr ""
@@ -46,13 +46,13 @@ msgstr ""
 msgid "activity types"
 msgstr ""
 
-#: apps/activity/models.py:48 apps/note/models/transactions.py:69
-#: apps/permission/models.py:90
+#: apps/activity/models.py:48 apps/note/models/transactions.py:70
+#: apps/permission/models.py:91
 msgid "description"
 msgstr ""
 
 #: apps/activity/models.py:54 apps/note/models/notes.py:164
-#: apps/note/models/transactions.py:62
+#: apps/note/models/transactions.py:63
 msgid "type"
 msgstr ""
 
@@ -120,11 +120,11 @@ msgstr ""
 msgid "create"
 msgstr ""
 
-#: apps/logs/models.py:61
+#: apps/logs/models.py:61 apps/note/tables.py:147
 msgid "edit"
 msgstr ""
 
-#: apps/logs/models.py:62
+#: apps/logs/models.py:62 apps/note/tables.py:151
 msgid "delete"
 msgstr ""
 
@@ -210,7 +210,7 @@ msgstr ""
 msgid "clubs"
 msgstr ""
 
-#: apps/member/models.py:120 apps/permission/models.py:275
+#: apps/member/models.py:120 apps/permission/models.py:276
 msgid "role"
 msgstr ""
 
@@ -255,12 +255,12 @@ msgstr ""
 msgid "Alias successfully deleted"
 msgstr ""
 
-#: apps/note/admin.py:120 apps/note/models/transactions.py:94
+#: apps/note/admin.py:120 apps/note/models/transactions.py:95
 msgid "source"
 msgstr ""
 
 #: apps/note/admin.py:128 apps/note/admin.py:156
-#: apps/note/models/transactions.py:53 apps/note/models/transactions.py:100
+#: apps/note/models/transactions.py:54 apps/note/models/transactions.py:108
 msgid "destination"
 msgstr ""
 
@@ -310,7 +310,7 @@ msgstr ""
 msgid "display image"
 msgstr ""
 
-#: apps/note/models/notes.py:53 apps/note/models/transactions.py:103
+#: apps/note/models/notes.py:53 apps/note/models/transactions.py:118
 msgid "created at"
 msgstr ""
 
@@ -384,55 +384,64 @@ msgstr ""
 msgid "You can't delete your main alias."
 msgstr ""
 
-#: apps/note/models/transactions.py:30
+#: apps/note/models/transactions.py:31
 msgid "transaction category"
 msgstr ""
 
-#: apps/note/models/transactions.py:31
+#: apps/note/models/transactions.py:32
 msgid "transaction categories"
 msgstr ""
 
-#: apps/note/models/transactions.py:47
+#: apps/note/models/transactions.py:48
 msgid "A template with this name already exist"
 msgstr ""
 
-#: apps/note/models/transactions.py:56 apps/note/models/transactions.py:111
+#: apps/note/models/transactions.py:57 apps/note/models/transactions.py:126
 msgid "amount"
 msgstr ""
 
-#: apps/note/models/transactions.py:57
+#: apps/note/models/transactions.py:58
 msgid "in centimes"
 msgstr ""
 
-#: apps/note/models/transactions.py:75
+#: apps/note/models/transactions.py:76
 msgid "transaction template"
 msgstr ""
 
-#: apps/note/models/transactions.py:76
+#: apps/note/models/transactions.py:77
 msgid "transaction templates"
 msgstr ""
 
-#: apps/note/models/transactions.py:107
+#: apps/note/models/transactions.py:101 apps/note/models/transactions.py:114
+#: apps/note/tables.py:33 apps/note/tables.py:42
+msgid "used alias"
+msgstr ""
+
+#: apps/note/models/transactions.py:122
 msgid "quantity"
 msgstr ""
 
-#: apps/note/models/transactions.py:115
+#: apps/note/models/transactions.py:130
 msgid "reason"
 msgstr ""
 
-#: apps/note/models/transactions.py:119
+#: apps/note/models/transactions.py:135
 msgid "valid"
 msgstr ""
 
-#: apps/note/models/transactions.py:124
+#: apps/note/models/transactions.py:140 apps/note/tables.py:95
+msgid "invalidity reason"
+msgstr ""
+
+#: apps/note/models/transactions.py:147
 msgid "transaction"
 msgstr ""
 
-#: apps/note/models/transactions.py:125
+#: apps/note/models/transactions.py:148
 msgid "transactions"
 msgstr ""
 
-#: apps/note/models/transactions.py:168 templates/base.html:98
+#: apps/note/models/transactions.py:202 templates/base.html:83
 #: templates/note/transaction_form.html:19
 #: templates/note/transaction_form.html:145
 msgid "Transfer"
@@ -634,15 +643,15 @@ msgid ""
 "again unless your session expires or you logout."
 msgstr ""
 
-#: note_kfet/settings/base.py:153
+#: note_kfet/settings/base.py:151
 msgid "German"
 msgstr ""
 
-#: note_kfet/settings/base.py:154
+#: note_kfet/settings/base.py:152
 msgid "English"
 msgstr ""
 
-#: note_kfet/settings/base.py:155
+#: note_kfet/settings/base.py:153
 msgid "French"
 msgstr ""
 
@@ -650,18 +659,14 @@ msgstr ""
 msgid "The ENS Paris-Saclay BDE note."
 msgstr ""
 
-#: templates/base.html:84
+#: templates/base.html:87
 msgid "Clubs"
 msgstr ""
 
-#: templates/base.html:89
+#: templates/base.html:92
 msgid "Activities"
 msgstr ""
 
-#: templates/base.html:94
-msgid "Buttons"
-msgstr ""
-
 #: templates/cas_server/base.html:7
 msgid "Central Authentication Service"
 msgstr ""
@@ -798,7 +803,7 @@ msgstr ""
 msgid "Sign up"
 msgstr ""
 
-#: templates/note/conso_form.html:28 templates/note/transaction_form.html:40
+#: templates/note/conso_form.html:28 templates/note/transaction_form.html:50
 msgid "Select emitters"
 msgstr ""
 
@@ -842,12 +847,28 @@ msgstr ""
 msgid "Transfer type"
 msgstr ""
 
+#: templates/note/transaction_form.html:86
+msgid "Name"
+msgstr ""
+
+#: templates/note/transaction_form.html:92
+msgid "First name"
+msgstr ""
+
+#: templates/note/transaction_form.html:98
+msgid "Bank"
+msgstr ""
+
 #: templates/note/transaction_form.html:111
 #: templates/note/transaction_form.html:169
 #: templates/note/transaction_form.html:176
 msgid "Select receivers"
 msgstr ""
 
+#: templates/note/transaction_form.html:128
+msgid "Amount"
+msgstr ""
+
 #: templates/note/transaction_form.html:138
 msgid "Reason"
 msgstr ""
@@ -864,6 +885,22 @@ msgstr ""
 msgid "Buttons list"
 msgstr ""
 
+#: templates/note/transactiontemplate_list.html:9
+msgid "search button"
+msgstr ""
+
+#: templates/note/transactiontemplate_list.html:20
+msgid "buttons listing "
+msgstr ""
+
+#: templates/note/transactiontemplate_list.html:71
+msgid "button successfully deleted "
+msgstr ""
+
+#: templates/note/transactiontemplate_list.html:75
+msgid "Unable to delete button "
+msgstr ""
+
 #: templates/registration/logged_out.html:8
 msgid "Thanks for spending some quality time with the Web site today."
 msgstr ""
@@ -873,7 +910,7 @@ msgid "Log in again"
 msgstr ""
 
 #: templates/registration/login.html:7 templates/registration/login.html:8
-#: templates/registration/login.html:26
+#: templates/registration/login.html:28
 #: templates/registration/password_reset_complete.html:10
 msgid "Log in"
 msgstr ""
@@ -885,7 +922,15 @@ msgid ""
 "page. Would you like to login to a different account?"
 msgstr ""
 
-#: templates/registration/login.html:27
+#: templates/registration/login.html:22
+msgid "You can also register via the central authentification server "
+msgstr ""
+
+#: templates/registration/login.html:23
+msgid "using this link "
+msgstr ""
+
+#: templates/registration/login.html:29
 msgid "Forgotten your password or username?"
 msgstr ""
 
diff --git a/locale/fr/LC_MESSAGES/django.po b/locale/fr/LC_MESSAGES/django.po
index 67af6bee..ca43d5a4 100644
--- a/locale/fr/LC_MESSAGES/django.po
+++ b/locale/fr/LC_MESSAGES/django.po
@@ -3,7 +3,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2020-03-24 15:49+0100\n"
+"POT-Creation-Date: 2020-03-26 14:40+0100\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -19,8 +19,8 @@ msgstr "activité"
 
 #: apps/activity/models.py:19 apps/activity/models.py:44
 #: apps/member/models.py:63 apps/member/models.py:114
-#: apps/note/models/notes.py:188 apps/note/models/transactions.py:24
-#: apps/note/models/transactions.py:44 apps/note/models/transactions.py:198
+#: apps/note/models/notes.py:188 apps/note/models/transactions.py:25
+#: apps/note/models/transactions.py:45 apps/note/models/transactions.py:232
 #: templates/member/profile_detail.html:15
 msgid "name"
 msgstr "nom"
@@ -41,13 +41,13 @@ msgstr "type d'activité"
 msgid "activity types"
 msgstr "types d'activité"
 
-#: apps/activity/models.py:48 apps/note/models/transactions.py:69
-#: apps/permission/models.py:90
+#: apps/activity/models.py:48 apps/note/models/transactions.py:70
+#: apps/permission/models.py:91
 msgid "description"
 msgstr "description"
 
 #: apps/activity/models.py:54 apps/note/models/notes.py:164
-#: apps/note/models/transactions.py:62
+#: apps/note/models/transactions.py:63
 msgid "type"
 msgstr "type"
 
@@ -115,11 +115,11 @@ msgstr "Nouvelles données"
 msgid "create"
 msgstr "Créer"
 
-#: apps/logs/models.py:61
+#: apps/logs/models.py:61 apps/note/tables.py:147
 msgid "edit"
 msgstr "Modifier"
 
-#: apps/logs/models.py:62
+#: apps/logs/models.py:62 apps/note/tables.py:151
 msgid "delete"
 msgstr "Supprimer"
 
@@ -209,7 +209,7 @@ msgstr "club"
 msgid "clubs"
 msgstr "clubs"
 
-#: apps/member/models.py:120 apps/permission/models.py:275
+#: apps/member/models.py:120 apps/permission/models.py:276
 msgid "role"
 msgstr "rôle"
 
@@ -254,12 +254,12 @@ msgstr "Compte n°%(id)s : %(username)s"
 msgid "Alias successfully deleted"
 msgstr "L'alias a bien été supprimé"
 
-#: apps/note/admin.py:120 apps/note/models/transactions.py:94
+#: apps/note/admin.py:120 apps/note/models/transactions.py:95
 msgid "source"
 msgstr "source"
 
 #: apps/note/admin.py:128 apps/note/admin.py:156
-#: apps/note/models/transactions.py:53 apps/note/models/transactions.py:100
+#: apps/note/models/transactions.py:54 apps/note/models/transactions.py:108
 msgid "destination"
 msgstr "destination"
 
@@ -310,7 +310,7 @@ msgstr ""
 msgid "display image"
 msgstr "image affichée"
 
-#: apps/note/models/notes.py:53 apps/note/models/transactions.py:103
+#: apps/note/models/notes.py:53 apps/note/models/transactions.py:118
 msgid "created at"
 msgstr "créée le"
 
@@ -384,35 +384,40 @@ msgstr "Un alias avec un nom similaire existe déjà : {}"
 msgid "You can't delete your main alias."
 msgstr "Vous ne pouvez pas supprimer votre alias principal."
 
-#: apps/note/models/transactions.py:30
+#: apps/note/models/transactions.py:31
 msgid "transaction category"
 msgstr "catégorie de transaction"
 
-#: apps/note/models/transactions.py:31
+#: apps/note/models/transactions.py:32
 msgid "transaction categories"
 msgstr "catégories de transaction"
 
-#: apps/note/models/transactions.py:47
+#: apps/note/models/transactions.py:48
 msgid "A template with this name already exist"
 msgstr "Un modèle de transaction avec un nom similaire existe déjà."
 
-#: apps/note/models/transactions.py:56 apps/note/models/transactions.py:111
+#: apps/note/models/transactions.py:57 apps/note/models/transactions.py:126
 msgid "amount"
 msgstr "montant"
 
-#: apps/note/models/transactions.py:57
+#: apps/note/models/transactions.py:58
 msgid "in centimes"
 msgstr "en centimes"
 
-#: apps/note/models/transactions.py:75
+#: apps/note/models/transactions.py:76
 msgid "transaction template"
 msgstr "modèle de transaction"
 
-#: apps/note/models/transactions.py:76
+#: apps/note/models/transactions.py:77
 msgid "transaction templates"
 msgstr "modèles de transaction"
 
-#: apps/note/models/transactions.py:107
+#: apps/note/models/transactions.py:101 apps/note/models/transactions.py:114
+#: apps/note/tables.py:33 apps/note/tables.py:42
+msgid "used alias"
+msgstr "alias utilisé"
+
+#: apps/note/models/transactions.py:122
 msgid "quantity"
 msgstr "quantité"
 
@@ -634,15 +639,15 @@ msgid ""
 "again unless your session expires or you logout."
 msgstr ""
 
-#: note_kfet/settings/base.py:153
+#: note_kfet/settings/base.py:151
 msgid "German"
 msgstr ""
 
-#: note_kfet/settings/base.py:154
+#: note_kfet/settings/base.py:152
 msgid "English"
 msgstr ""
 
-#: note_kfet/settings/base.py:155
+#: note_kfet/settings/base.py:153
 msgid "French"
 msgstr ""
 
@@ -650,18 +655,14 @@ msgstr ""
 msgid "The ENS Paris-Saclay BDE note."
 msgstr "La note du BDE de l'ENS Paris-Saclay."
 
-#: templates/base.html:84
+#: templates/base.html:87
 msgid "Clubs"
 msgstr "Clubs"
 
-#: templates/base.html:89
+#: templates/base.html:92
 msgid "Activities"
 msgstr "Activités"
 
-#: templates/base.html:94
-msgid "Buttons"
-msgstr "Boutons"
-
 #: templates/cas_server/base.html:7
 msgid "Central Authentication Service"
 msgstr ""
@@ -800,7 +801,7 @@ msgstr "Sauvegarder les changements"
 msgid "Sign up"
 msgstr "Inscription"
 
-#: templates/note/conso_form.html:28 templates/note/transaction_form.html:40
+#: templates/note/conso_form.html:28 templates/note/transaction_form.html:50
 msgid "Select emitters"
 msgstr "Sélection des émetteurs"
 
@@ -844,12 +845,28 @@ msgstr "Paiement externe"
 msgid "Transfer type"
 msgstr "Type de transfert"
 
+#: templates/note/transaction_form.html:86
+msgid "Name"
+msgstr "Nom"
+
+#: templates/note/transaction_form.html:92
+msgid "First name"
+msgstr "Prénom"
+
+#: templates/note/transaction_form.html:98
+msgid "Bank"
+msgstr "Banque"
+
 #: templates/note/transaction_form.html:111
 #: templates/note/transaction_form.html:169
 #: templates/note/transaction_form.html:176
 msgid "Select receivers"
 msgstr "Sélection des destinataires"
 
+#: templates/note/transaction_form.html:128
+msgid "Amount"
+msgstr "Montant"
+
 #: templates/note/transaction_form.html:138
 msgid "Reason"
 msgstr "Raison"
@@ -866,6 +883,22 @@ msgstr "Note à débiter"
 msgid "Buttons list"
 msgstr "Liste des boutons"
 
+#: templates/note/transactiontemplate_list.html:9
+msgid "search button"
+msgstr "Chercher un bouton"
+
+#: templates/note/transactiontemplate_list.html:20
+msgid "buttons listing "
+msgstr "Liste des boutons"
+
+#: templates/note/transactiontemplate_list.html:71
+msgid "button successfully deleted "
+msgstr "Le bouton a bien été supprimé"
+
+#: templates/note/transactiontemplate_list.html:75
+msgid "Unable to delete button "
+msgstr "Impossible de supprimer le bouton "
+
 #: templates/registration/logged_out.html:8
 msgid "Thanks for spending some quality time with the Web site today."
 msgstr ""
@@ -875,7 +908,7 @@ msgid "Log in again"
 msgstr ""
 
 #: templates/registration/login.html:7 templates/registration/login.html:8
-#: templates/registration/login.html:26
+#: templates/registration/login.html:28
 #: templates/registration/password_reset_complete.html:10
 msgid "Log in"
 msgstr ""
@@ -887,7 +920,15 @@ msgid ""
 "page. Would you like to login to a different account?"
 msgstr ""
 
-#: templates/registration/login.html:27
+#: templates/registration/login.html:22
+msgid "You can also register via the central authentification server "
+msgstr ""
+
+#: templates/registration/login.html:23
+msgid "using this link "
+msgstr ""
+
+#: templates/registration/login.html:29
 msgid "Forgotten your password or username?"
 msgstr ""
 
diff --git a/static/js/base.js b/static/js/base.js
index b22df077..422c2b6f 100644
--- a/static/js/base.js
+++ b/static/js/base.js
@@ -265,7 +265,16 @@ function autoCompleteNote(field_id, alias_matched_id, note_list_id, notes, notes
 }
 
 // When a validate button is clicked, we switch the validation status
-function de_validate(id, validated) {
+function in_validate(id, validated) {
+
+    let invalidity_reason;
+    let reason_obj = $("#invalidity_reason_" + id);
+
+    if (validated)
+        invalidity_reason = reason_obj.val();
+    else
+        invalidity_reason = null;
+
     $("#validate_" + id).html("<strong style=\"font-size: 16pt;\">⟳ ...</strong>");
 
     // Perform a PATCH request to the API in order to update the transaction
@@ -278,12 +287,13 @@ function de_validate(id, validated) {
             "X-CSRFTOKEN": CSRF_TOKEN
         },
         data: {
-            "resourcetype": "RecurrentTransaction",
-            valid: !validated
+            resourcetype: "RecurrentTransaction",
+            valid: !validated,
+            invalidity_reason: invalidity_reason,
         },
         success: function () {
             // Refresh jQuery objects
-            $(".validate").click(de_validate);
+            $(".validate").click(in_validate);
 
             refreshBalance();
             // error if this method doesn't exist. Please define it.
diff --git a/static/js/consos.js b/static/js/consos.js
index 896f996c..8ac2b7eb 100644
--- a/static/js/consos.js
+++ b/static/js/consos.js
@@ -167,7 +167,7 @@ function reset() {
 function consumeAll() {
     notes_display.forEach(function(note_display) {
         buttons.forEach(function(button) {
-            consume(note_display.id, button.dest, button.quantity * note_display.quantity, button.amount,
+            consume(note_display.id, note_display.name, button.dest, button.quantity * note_display.quantity, button.amount,
                 button.name + " (" + button.category_name + ")", button.type, button.category_id, button.id);
        });
     });
@@ -176,6 +176,7 @@ function consumeAll() {
 /**
  * Create a new transaction from a button through the API.
  * @param source The note that paid the item (type: int)
+ * @param source_alias The alias used for the source (type: str)
  * @param dest The note that sold the item (type: int)
  * @param quantity The quantity sold (type: int)
  * @param amount The price of one item, in cents (type: int)
@@ -184,7 +185,7 @@ function consumeAll() {
  * @param category The category id of the button (type: int)
  * @param template The button id (type: int)
  */
-function consume(source, dest, quantity, amount, reason, type, category, template) {
+function consume(source, source_alias, dest, quantity, amount, reason, type, category, template) {
     $.post("/api/note/transaction/transaction/",
         {
             "csrfmiddlewaretoken": CSRF_TOKEN,
@@ -195,12 +196,32 @@ function consume(source, dest, quantity, amount, reason, type, category, templat
             "polymorphic_ctype": type,
             "resourcetype": "RecurrentTransaction",
             "source": source,
+            "source_alias": source_alias,
             "destination": dest,
             "category": category,
             "template": template
         }, reset).fail(function (e) {
-            reset();
-
-            addMsg("Une erreur est survenue lors de la transaction : " + e.responseText, "danger");
+            $.post("/api/note/transaction/transaction/",
+            {
+                "csrfmiddlewaretoken": CSRF_TOKEN,
+                "quantity": quantity,
+                "amount": amount,
+                "reason": reason,
+                "valid": false,
+                "invalidity_reason": "Solde insuffisant",
+                "polymorphic_ctype": type,
+                "resourcetype": "RecurrentTransaction",
+                "source": source,
+                "source_alias": source_alias,
+                "destination": dest,
+                "category": category,
+                "template": template
+            }).done(function() {
+                reset();
+                addMsg("La transaction n'a pas pu être validée pour cause de solde insuffisant.", "danger");
+            }).fail(function () {
+                reset();
+                addMsg("Une erreur est survenue lors de la transaction : " + e.responseText, "danger");
+            });
     });
 }
diff --git a/static/js/transfer.js b/static/js/transfer.js
index a4171910..cf62e453 100644
--- a/static/js/transfer.js
+++ b/static/js/transfer.js
@@ -83,19 +83,41 @@ $("#transfer").click(function() {
                     "polymorphic_ctype": TRANSFER_POLYMORPHIC_CTYPE,
                     "resourcetype": "Transaction",
                     "source": user_id,
-                    "destination": dest.id
-                }, function () {
+                    "destination": dest.id,
+                    "destination_alias": dest.name
+                }).done(function () {
                     addMsg("Le transfert de "
                         + pretty_money(dest.quantity * 100 * $("#amount").val()) + " de votre note "
                         + " vers la note " + dest.name + " a été fait avec succès !", "success");
 
                     reset();
-                }).fail(function (err) {
-                    addMsg("Le transfert de "
-                        + pretty_money(dest.quantity * 100 * $("#amount").val()) + " de votre note "
-                        + " vers la note " + dest.name + " a échoué : " + err.responseText, "danger");
+                }).fail(function () {
+                    $.post("/api/note/transaction/transaction/",
+                    {
+                        "csrfmiddlewaretoken": CSRF_TOKEN,
+                        "quantity": dest.quantity,
+                        "amount": 100 * $("#amount").val(),
+                        "reason": $("#reason").val(),
+                        "valid": false,
+                        "invalidity_reason": "Solde insuffisant",
+                        "polymorphic_ctype": TRANSFER_POLYMORPHIC_CTYPE,
+                        "resourcetype": "Transaction",
+                        "source": user_id,
+                        "destination": dest.id,
+                        "destination_alias": dest.name
+                    }).done(function () {
+                        addMsg("Le transfert de "
+                            + pretty_money(dest.quantity * 100 * $("#amount").val()) + " de votre note "
+                            + " vers la note " + dest.name + " a échoué : Solde insuffisant", "danger");
 
-                reset();
+                        reset();
+                    }).fail(function (err) {
+                        addMsg("Le transfert de "
+                            + pretty_money(dest.quantity * 100 * $("#amount").val()) + " de votre note "
+                            + " vers la note " + dest.name + " a échoué : " + err.responseText, "danger");
+
+                    reset();
+                });
             });
         });
     }
@@ -112,19 +134,43 @@ $("#transfer").click(function() {
                         "polymorphic_ctype": TRANSFER_POLYMORPHIC_CTYPE,
                         "resourcetype": "Transaction",
                         "source": source.id,
-                        "destination": dest.id
-                    }, function () {
+                        "source_alias": source.name,
+                        "destination": dest.id,
+                        "destination_alias": dest.name
+                    }).done(function () {
                         addMsg("Le transfert de "
                             + pretty_money(source.quantity * dest.quantity * 100 * $("#amount").val()) + " de la note " + source.name
                             + " vers la note " + dest.name + " a été fait avec succès !", "success");
 
                         reset();
                     }).fail(function (err) {
-                        addMsg("Le transfert de "
-                            + pretty_money(source.quantity * dest.quantity * 100 * $("#amount").val()) + " de la note " + source.name
-                            + " vers la note " + dest.name + " a échoué : " + err.responseText, "danger");
+                        $.post("/api/note/transaction/transaction/",
+                        {
+                            "csrfmiddlewaretoken": CSRF_TOKEN,
+                            "quantity": source.quantity * dest.quantity,
+                            "amount": 100 * $("#amount").val(),
+                            "reason": $("#reason").val(),
+                            "valid": false,
+                            "invalidity_reason": "Solde insuffisant",
+                            "polymorphic_ctype": TRANSFER_POLYMORPHIC_CTYPE,
+                            "resourcetype": "Transaction",
+                            "source": source.id,
+                            "source_alias": source.name,
+                            "destination": dest.id,
+                            "destination_alias": dest.name
+                        }).done(function () {
+                            addMsg("Le transfert de "
+                                + pretty_money(source.quantity * dest.quantity * 100 * $("#amount").val()) + " de la note " + source.name
+                                + " vers la note " + dest.name + " a échoué : Solde insuffisant", "danger");
 
-                        reset();
+                            reset();
+                        }).fail(function (err) {
+                            addMsg("Le transfert de "
+                                + pretty_money(source.quantity * dest.quantity * 100 * $("#amount").val()) + " de la note " + source.name
+                                + " vers la note " + dest.name + " a échoué : " + err.responseText, "danger");
+
+                            reset();
+                    });
                 });
             });
         });
@@ -157,15 +203,17 @@ $("#transfer").click(function() {
                 "polymorphic_ctype": SPECIAL_TRANSFER_POLYMORPHIC_CTYPE,
                 "resourcetype": "SpecialTransaction",
                 "source": source,
+                "source_alias": source.name,
                 "destination": dest,
+                "destination_alias": dest.name,
                 "last_name": $("#last_name").val(),
                 "first_name": $("#first_name").val(),
                 "bank": $("#bank").val()
-            }, function () {
+            }).done(function () {
                 addMsg("Le crédit/retrait a bien été effectué !", "success");
                 reset();
             }).fail(function (err) {
-                addMsg("Le crédit/transfert a échoué : " + err.responseText, "danger");
+                addMsg("Le crédit/retrait a échoué : " + err.responseText, "danger");
                 reset();
         });
     }