diff --git a/subscription/forms.py b/subscription/forms.py
index 7710825b..1f4c193d 100644
--- a/subscription/forms.py
+++ b/subscription/forms.py
@@ -23,6 +23,14 @@ class SelectionDateForm(forms.Form):
 
 
 class SubscriptionForm(forms.ModelForm):
+    def __init__(self, *args, **kwargs):
+        initial = kwargs.pop("initial", {})
+        if "subscription_type" not in initial:
+            initial["subscription_type"] = "deux-semestres"
+        if "payment_method" not in initial:
+            initial["payment_method"] = "CARD"
+        super().__init__(*args, initial=initial, **kwargs)
+
     def save(self, *args, **kwargs):
         if self.errors:
             # let django deal with the error messages
diff --git a/subscription/views.py b/subscription/views.py
index 3e8cf0f1..2948391b 100644
--- a/subscription/views.py
+++ b/subscription/views.py
@@ -39,7 +39,9 @@ class NewSubscription(CanCreateSubscriptionMixin, TemplateView):
 
     def get_context_data(self, **kwargs):
         return super().get_context_data(**kwargs) | {
-            "existing_user_form": SubscriptionExistingUserForm(),
+            "existing_user_form": SubscriptionExistingUserForm(
+                initial={"member": self.request.GET.get("member")}
+            ),
             "new_user_form": SubscriptionNewUserForm(),
             "existing_user_post_url": reverse("subscription:fragment-existing-user"),
             "new_user_post_url": reverse("subscription:fragment-new-user"),