Help and Contact Us
To contact us by phone:
Member Service Line:414-546-7450
Guardian Line (24-hour telephone teller):
414-856-9323
Debit Card Activation/PIN Change:
Domestic: 866-762-0558
International: 501-588-7531
Lost or Stolen Debit Card:
Within U.S.: 888-241-2510
Outside U.S.: 909-941-1398
Lost or Stolen Credit Card:
855-633-0299
To contact us by mail:
Guardian Credit Union7801 S. Howell Avenue
Oak Creek, WI 53154
