diff --git a/note/models.py b/note/models.py
index 71a83623..f069100d 100644
--- a/note/models.py
+++ b/note/models.py
@@ -1,3 +1,89 @@
+# -*- mode: python; coding: utf-8 -*-
+# Copyright (C) 2018-2019 by BDE ENS Paris-Saclay
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+from django.conf import settings
+from django.contrib.auth.models import User
 from django.db import models
 
-# Create your models here.
+from django.contrib.contenttypes.models import ContentType
+from django.contrib.contenttypes.fields import GenericForeignKey
+
+
+class Alias(models.Model):
+    """
+    A alias labels a Note instance, only for user and clubs
+    """
+    alias = models.TextField(
+        "alias",
+        unique = True,
+        blank = False,
+        null = False,
+    )
+    limit = models.Q(app_label="note", model="NoteUser") | models.Q(app_label="note",model="NoteClub")
+
+    owner_id = models.PositiveIntegerField()
+    owner_type = models.ForeignKey(ContentType,
+                                   on_delete=models.CASCADE,
+                                   limit_choices_to=limit)
+    owner = GenericForeignKey('owner_type','owner_id')
+
+class Note(models.Model):
+    """
+    An abstract model, use to add transactions capabilities to a user
+    """
+
+    solde = model.IntegerField(
+        verbose_name=_('solde du compte'),
+        help_text=_("en centime, l' argent crédité pour cette instance")
+    )
+    active = model.BooleanField(
+        default = True,
+        verbose_name=_('etat du compte')
+    )
+
+    class Meta:
+        abstract = True
+
+class NoteUser(Note):
+    """
+    A Note associated to a User
+    """
+    user = models.OneToOneField(
+        settings.AUTH_USER_MODEL,
+        on_delete=models.CASCADE,
+    )
+    class Meta:
+        verbose_name = _("One's Note")
+        verbose_name_plural = _("Users Note")
+
+    def __str__(self):
+        return self.user.get_username()
+
+    aliases = model.ForeignKey(Aliases)
+
+
+
+class NoteSpec(Note):
+    """
+    A Note for special Account, where real money enter or leave the system.
+     - Cash
+     - Credit Card
+     - Bank Transfert
+     - Bank Check
+     - Refund
+    """
+    account_type = model.CharField(
+        max_length = 2,
+        choices = (("CH","chèques"),
+                   ("CB","Carte Bancaire"),
+                   ("VB","Virement Bancaire"),
+                   ("CA","Cash"),
+                   ("RB","Remboursement")
+        ),
+        unique = True
+    )
+
+class NoteClub(Note):
+    #to be added
+    pass