diff --git a/users/forms.py b/users/forms.py
index a6ea70b9..e2339a0d 100644
--- a/users/forms.py
+++ b/users/forms.py
@@ -375,6 +375,22 @@ class AdherentForm(FormRevMixin, FieldPermissionFormMixin, ModelForm):
             remove_user_room(self.cleaned_data.get('room'))
         return
 
+class AdherentCreationForm(AdherentForm):
+    """Formulaire de création d'un user.
+    AdherentForm auquel on ajoute une checkbox afin d'éviter les
+    doublons d'utilisateurs"""
+    def __init__(self, *args, **kwargs):
+        super(AdherentCreationForm, self).__init__(*args, **kwargs)
+        
+        # Champ permettant d'éviter au maxium les doublons d'utilisateurs
+        former_user_check_info = _("If you already have an account, please use it. "\
+                               + "If your lost access to it, please consider "\
+                               + "using the forgotten password button on the "\
+                               + "login page or contacting support.")
+        self.fields['former_user_check'] = forms.BooleanField(required=True,
+                                                             help_text=former_user_check_info)
+        self.fields['former_user_check'].label = _("I have not had an account before")
+
 
 class ClubForm(FormRevMixin, FieldPermissionFormMixin, ModelForm):
     """Formulaire de base d'edition d'un user. Formulaire de base, utilisé
diff --git a/users/views.py b/users/views.py
index 360e256b..41138ce3 100644
--- a/users/views.py
+++ b/users/views.py
@@ -100,6 +100,7 @@ from .forms import (
     ServiceUserForm,
     ListRightForm,
     AdherentForm,
+    AdherentCreationForm,
     ClubForm,
     MassArchiveForm,
     PassForm,
@@ -114,7 +115,7 @@ from .forms import (
 def new_user(request):
     """ Vue de création d'un nouvel utilisateur,
     envoie un mail pour le mot de passe"""
-    user = AdherentForm(request.POST or None, user=request.user)
+    user = AdherentCreationForm(request.POST or None, user=request.user)
     GTU_sum_up = GeneralOption.get_cached_value('GTU_sum_up')
     GTU = GeneralOption.get_cached_value('GTU')
     if user.is_valid():