diff --git a/cotisations/models.py b/cotisations/models.py
index 60c6cc33..d72ec60b 100644
--- a/cotisations/models.py
+++ b/cotisations/models.py
@@ -56,6 +56,8 @@ class NewFactureForm(ModelForm):
         self.fields['cheque'].required = False
         self.fields['banque'].required = False
         self.fields['cheque'].label = 'Numero de chèque'
+        self.fields['banque'].empty_label = "Non renseigné"
+        self.fields['paiement'].empty_label = "Séléctionner un moyen de paiement"
 
     class Meta:
         model = Facture
@@ -71,6 +73,9 @@ class EditFactureForm(ModelForm):
         self.fields['cheque'].label = 'Numero de chèque'
         self.fields['name'].label = 'Designation'
         self.fields['prix'].label = 'Prix unitaire'
+        self.fields['banque'].empty_label = "Non renseigné"
+        self.fields['paiement'].empty_label = "Séléctionner un moyen de paiement"
+        self.fields['user'].empty_label = "Séléctionner l'adhérent propriétaire"
 
     class Meta:
         model = Facture
diff --git a/machines/models.py b/machines/models.py
index 1cf9c557..778a83fb 100644
--- a/machines/models.py
+++ b/machines/models.py
@@ -25,7 +25,7 @@ class Interface(models.Model):
     mac_address = MACAddressField(integer=False, unique=True)
     machine = models.ForeignKey('Machine', on_delete=models.PROTECT)
     details = models.CharField(max_length=255, blank=True)
-    dns = models.CharField(help_text="Obligatoire et unique", max_length=255, unique=True)
+    dns = models.CharField(help_text="Obligatoire et unique, doit se terminer en .rez et ne pas comporter de points", max_length=255, unique=True)
 
     def __str__(self):
         return self.dns
@@ -45,6 +45,7 @@ class EditMachineForm(ModelForm):
         super(EditMachineForm, self).__init__(*args, **kwargs)
         self.fields['name'].label = 'Nom de la machine'
         self.fields['type'].label = 'Type de machine'
+        self.fields['type'].empty_label = "Séléctionner un type de machine"
 
 class NewMachineForm(EditMachineForm):
     class Meta(EditMachineForm.Meta):
diff --git a/users/models.py b/users/models.py
index b37f6066..446dac15 100644
--- a/users/models.py
+++ b/users/models.py
@@ -29,7 +29,7 @@ class User(models.Model):
     surname = models.CharField(max_length=255)
     pseudo = models.CharField(max_length=255, unique=True)
     email = models.EmailField()
-    school = models.ForeignKey('School', on_delete=models.PROTECT)
+    school = models.ForeignKey('School', on_delete=models.PROTECT, null=False, blank=False)
     comment = models.CharField(help_text="Commentaire, promo", max_length=255, blank=True)
     room = models.OneToOneField('topologie.Room', on_delete=models.PROTECT, blank=True, null=True)
     pwd_ssha = models.CharField(max_length=255)
@@ -80,19 +80,6 @@ class Whitelist(models.Model):
     def __str__(self):
         return str(self.user) + ' ' + str(self.raison)
 
-class UserForm(ModelForm):
-    def __init__(self, *args, **kwargs):
-        super(InfoForm, self).__init__(*args, **kwargs)
-        self.fields['name'].label = 'Nom'
-        self.fields['surname'].label = 'Prénom'
-        self.fields['school'].label = 'Établissement'
-        self.fields['comment'].label = 'Commentaire'
-        self.fields['room'].label = 'Chambre'
-
-    class Meta:
-        model = User
-        fields = '__all__'
-
 class InfoForm(ModelForm):
     force = forms.BooleanField(label="Forcer le déménagement ?", initial=False, required=False)
 
@@ -103,6 +90,8 @@ class InfoForm(ModelForm):
         self.fields['school'].label = 'Établissement'
         self.fields['comment'].label = 'Commentaire'
         self.fields['room'].label = 'Chambre'
+        self.fields['room'].empty_label = "Pas de chambre"
+        self.fields['school'].empty_label = "Séléctionner un établissement"
 
     def clean_force(self):
         if self.cleaned_data.get('force', False):
@@ -113,6 +102,10 @@ class InfoForm(ModelForm):
         model = User
         fields = ['name','surname','pseudo','email', 'school', 'comment', 'room']
 
+class UserForm(InfoForm):
+    class Meta(InfoForm.Meta):
+        fields = '__all__'
+
 class PasswordForm(ModelForm):
     class Meta:
         model = User
@@ -132,6 +125,7 @@ class RightForm(ModelForm):
     def __init__(self, *args, **kwargs):
         super(RightForm, self).__init__(*args, **kwargs)
         self.fields['right'].label = 'Droit'
+        self.fields['right'].empty_label = "Choisir un nouveau droit"
 
     class Meta:
         model = Right