diff --git a/cotisations/models.py b/cotisations/models.py
index 759f5320..e0197567 100644
--- a/cotisations/models.py
+++ b/cotisations/models.py
@@ -871,7 +871,7 @@ class Paiement(RevMixin, AclMixin, models.Model):
         """
         self.moyen = self.moyen.title()
 
-    def end_payment(self, invoice, request, use_payment_method=True):
+    def end_payment(self, invoice, request, use_payment_method=True, *args, **kwargs):
         """
         The general way of ending a payment.
 
@@ -887,7 +887,7 @@ class Paiement(RevMixin, AclMixin, models.Model):
         """
         payment_method = find_payment_method(self)
         if payment_method is not None and use_payment_method:
-            return payment_method.end_payment(invoice, request)
+            return payment_method.end_payment(invoice, request, *args, **kwargs)
 
         # So make this invoice valid, trigger send mail
         invoice.valid = True
diff --git a/cotisations/payment_methods/__init__.py b/cotisations/payment_methods/__init__.py
index 1170bd92..77eec252 100644
--- a/cotisations/payment_methods/__init__.py
+++ b/cotisations/payment_methods/__init__.py
@@ -101,7 +101,7 @@ But this payment method is not really usefull, since it does noting !
 You have to redefine the `end_payment` method. Here is its prototype :
 
 ```python
-def end_payment(self, invoice, request):
+def end_payment(self, invoice, request, *args, **kwargs):
     pass
 ```
 
diff --git a/cotisations/payment_methods/balance/models.py b/cotisations/payment_methods/balance/models.py
index 9f07f930..d143793a 100644
--- a/cotisations/payment_methods/balance/models.py
+++ b/cotisations/payment_methods/balance/models.py
@@ -66,7 +66,7 @@ class BalancePayment(PaymentMethodMixin, models.Model):
         verbose_name=_("allow user to credit their balance"), default=False
     )
 
-    def end_payment(self, invoice, request):
+    def end_payment(self, invoice, request, *args, **kwargs):
         """Changes the user's balance to pay the invoice. If it is not
         possible, shows an error and invalidates the invoice.
         """
diff --git a/cotisations/payment_methods/cheque/models.py b/cotisations/payment_methods/cheque/models.py
index c05099ab..245d2fbb 100644
--- a/cotisations/payment_methods/cheque/models.py
+++ b/cotisations/payment_methods/cheque/models.py
@@ -42,7 +42,7 @@ class ChequePayment(PaymentMethodMixin, models.Model):
         editable=False,
     )
 
-    def end_payment(self, invoice, request):
+    def end_payment(self, invoice, request, *args, **kwargs):
         """Invalidates the invoice then redirect the user towards a view asking
         for informations to add to the invoice before validating it.
         """
diff --git a/cotisations/payment_methods/free/models.py b/cotisations/payment_methods/free/models.py
index a4c24459..a4be807f 100644
--- a/cotisations/payment_methods/free/models.py
+++ b/cotisations/payment_methods/free/models.py
@@ -42,7 +42,7 @@ class FreePayment(PaymentMethodMixin, models.Model):
         editable=False,
     )
 
-    def end_payment(self, invoice, request):
+    def end_payment(self, invoice, request, *args, **kwargs):
         """Ends the payment normally.
         """
         return invoice.paiement.end_payment(invoice, request, use_payment_method=False)
diff --git a/cotisations/payment_methods/mixins.py b/cotisations/payment_methods/mixins.py
index 8c3b1dc9..ca86984d 100644
--- a/cotisations/payment_methods/mixins.py
+++ b/cotisations/payment_methods/mixins.py
@@ -23,10 +23,10 @@
 class PaymentMethodMixin:
     """A simple mixin to avoid redefining end_payment if you don't need to"""
 
-    def end_payment(self, invoice, request):
+    def end_payment(self, invoice, request, *args, **kwargs):
         """Redefine this method in order to get a different ending to the
         payment session if you whish.
 
         Must return a HttpResponse-like object.
         """
-        return self.payment.end_payment(invoice, request, use_payment_method=False)
+        return self.payment.end_payment(invoice, request, use_payment_method=False, *args, **kwargs)
diff --git a/cotisations/payment_methods/note_kfet/models.py b/cotisations/payment_methods/note_kfet/models.py
index 4f1a8152..517fcc55 100644
--- a/cotisations/payment_methods/note_kfet/models.py
+++ b/cotisations/payment_methods/note_kfet/models.py
@@ -49,7 +49,7 @@ class NotePayment(PaymentMethodMixin, models.Model):
     port = models.PositiveIntegerField(blank=True, null=True)
     id_note = models.PositiveIntegerField(blank=True, null=True)
 
-    def end_payment(self, invoice, request):
+    def end_payment(self, invoice, request, *args, **kwargs):
         return redirect(
             reverse(
                 "cotisations:note_kfet:note_payment", kwargs={"factureid": invoice.id}
diff --git a/cotisations/views.py b/cotisations/views.py
index 7aa771b5..883da1fd 100644
--- a/cotisations/views.py
+++ b/cotisations/views.py
@@ -154,7 +154,7 @@ def new_facture(request, user, userid):
 
                 return new_invoice_instance.paiement.end_payment(
                     new_invoice_instance,request,
-                    ipn_host=settings.ALLOWED_HOSTS[0] if request.path.contains("portail") else None,
+                    ipn_host=settings.ALLOWED_HOSTS[0] if "portail" in request.path else None,
                 )
         else:
             messages.error(request, _("You need to choose at least one article."))