diff --git a/modules/account_payment_sepa/party.py b/modules/account_payment_sepa/party.py
index a0a18a64a0..cad79e1714 100644
--- a/modules/account_payment_sepa/party.py
+++ b/modules/account_payment_sepa/party.py
@@ -61,6 +61,7 @@ class PartyReceptionDirectDebit(metaclass=PoolMeta):
             ],
         states={
             'invisible': Eval('process_method') != 'sepa',
+            'required': Eval('process_method') == 'sepa',
             'readonly': ~Eval('party') | (Eval('party', -1) < 0),
             })