diff --git a/rattail/membership.py b/rattail/membership.py
index 19e2c613267b76e3b557ba44d5916f19e0613093..f8d04f5b6d0b08a23085f4d7b8c4b39ddf7bd37d 100644
--- a/rattail/membership.py
+++ b/rattail/membership.py
@@ -2,7 +2,7 @@
 ################################################################################
 #
 #  Rattail -- Retail Software Framework
-#  Copyright © 2010-2021 Lance Edgar
+#  Copyright © 2010-2022 Lance Edgar
 #
 #  This file is part of Rattail.
 #
@@ -74,3 +74,6 @@ class MembershipHandler(GenericHandler):
         customer = self.get_customer(member)
         person = clientele.get_person(customer)
         return person
+
+    def get_last_patronage_date(self, member, **kwargs):
+        raise NotImplementedError