diff --git a/pycroft/lib/finance/retransfer.py b/pycroft/lib/finance/retransfer.py
index fd5a95fe2..f5b88eb3c 100644
--- a/pycroft/lib/finance/retransfer.py
+++ b/pycroft/lib/finance/retransfer.py
@@ -73,5 +73,3 @@ def attribute_activities_as_returned(
             split for split in transaction.splits if split.account_id == credit_account.id
         )
         session.add(activity)
-
-    session.commit()
diff --git a/tests/factories/config.py b/tests/factories/config.py
index 03cb9136f..2291fc0e7 100644
--- a/tests/factories/config.py
+++ b/tests/factories/config.py
@@ -36,3 +36,4 @@ class Meta:
     # `Account`s
     membership_fee_account = SubFactory(AccountFactory, type="REVENUE")
     membership_fee_bank_account = SubFactory(BankAccountFactory)
+    non_attributable_transactions_account = SubFactory(AccountFactory, type="REVENUE")
diff --git a/web/blueprints/finance/__init__.py b/web/blueprints/finance/__init__.py
index 9688cd866..0a0e7e7fe 100644
--- a/web/blueprints/finance/__init__.py
+++ b/web/blueprints/finance/__init__.py
@@ -603,14 +603,21 @@ def bank_account_activities_return_do() -> ResponseReturnValue:
 
     form: t.Any = _create_form(field_list)()
 
-    if form.validate_on_submit():
-        selected_activities: list[BankAccountActivity] = [
-            activity for activity in activities_to_return if form[str(activity.id)].data
-        ]
+    if not form.validate_on_submit():
+        return render_template(
+            "finance/bank_account_activities_return.html",
+            form=form(),
+            activities=activities_to_return,
+        )
 
-        sepa_xml: bytes = generate_activities_return_sepaxml(selected_activities)
+    selected_activities: list[BankAccountActivity] = [
+        activity for activity in activities_to_return if form[str(activity.id)].data
+    ]
+
+    sepa_xml: bytes = generate_activities_return_sepaxml(selected_activities)
 
-        attribute_activities_as_returned(session, selected_activities, current_user)
+    attribute_activities_as_returned(session, selected_activities, current_user)
+    session.commit()
 
     return send_file(
         BytesIO(sepa_xml),