diff --git a/collectives/routes/auth/signup.py b/collectives/routes/auth/signup.py
index f857b0df..9f629a57 100644
--- a/collectives/routes/auth/signup.py
+++ b/collectives/routes/auth/signup.py
@@ -273,6 +273,14 @@ def check_user_validity(form):
     :returns: True if license is valid, False if not, None if there is an error"""
     license_number = form.license.data
     try:
+        if Configuration.CLUB_PREFIX:
+            if not license_number.startswith(Configuration.CLUB_PREFIX):
+                form.generic_error = (
+                    f"La license n'est pas active pour {Configuration.CLUB_NAME}. Merci d'indiquer "
+                    f"un numéro de licence débutant par {Configuration.CLUB_PREFIX}."
+                )
+                return False
+
         license_info = extranet.api.check_license(license_number)
         if not license_info.is_valid_at_time(current_time()):
             form.generic_error = (
diff --git a/tests/test_extranet.py b/tests/test_extranet.py
index 1d403fbb..686790ed 100644
--- a/tests/test_extranet.py
+++ b/tests/test_extranet.py
@@ -18,6 +18,7 @@ def test_create_account(client, extranet_monkeypatch):
 
     # Setup conf as extranet account creation
     Configuration.EXTRANET_ACCOUNT_ID = "XXX"
+    Configuration.CLUB_PREFIX = "7400"
 
     # First signup stage
     response = client.get("/auth/signup")
@@ -196,3 +197,44 @@ def test_user_resync_account(user1_client, user2, extranet_monkeypatch):
     )
     assert response.status_code == 200
     assert "error message" in response.text
+
+
+def test_signup_licence_nocheck(client, extranet_monkeypatch):
+    """Test the licence check during signup without club licence check"""
+
+    # Setup conf as extranet account creation
+    Configuration.EXTRANET_ACCOUNT_ID = "XXX"
+    Configuration.CLUB_PREFIX = ""
+
+    # First signup stage
+    response = client.get("/auth/signup")
+    assert response.status_code == 200
+    data = {
+        "mail": "test@example.com",
+        "license": mock.extranet.VALID_LICENSE,
+        "date_of_birth": "2022-10-04",
+    }
+    response = client.post("/auth/signup", data=data)
+    assert response.status_code == 302
+    assert "flash-error" not in response.text
+    assert mock.extranet.STORED_TOKEN is not None
+
+
+def test_signup_licence_check_wrong_club(client, extranet_monkeypatch):
+    """Test the not valdi licence during signup with club licence check"""
+
+    # Setup conf as extranet account creation
+    Configuration.EXTRANET_ACCOUNT_ID = "XXX"
+    Configuration.CLUB_PREFIX = "9900"
+
+    # First signup stage
+    response = client.get("/auth/signup")
+    assert response.status_code == 200
+    data = {
+        "mail": "test@example.com",
+        "license": mock.extranet.VALID_LICENSE,
+        "date_of_birth": "2022-10-04",
+    }
+    response = client.post("/auth/signup", data=data)
+    assert response.status_code == 200
+    assert "flash-error" in response.text