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To contact us by phone:
Member Service Line:
800-556-5154 or 414-546-7450
Guardian Line (24-hour telephone teller):
800-941-1313 or 414-856-9323
Lost or Stolen Guardian Debit Card:
To contact us by mail:
Guardian Credit Union
P.O. Box 270124
West Allis, WI 53227
Need a password for the Guardian Line?
The first time you call, your access code will be the last four digits of your social security number. After accessing the Guardian Line for the first time, you will be asked to personalize your access code. If you need help, please call our Member Service Line, 800-556-5154.
Credit Union Service Centers
Through a network of shared branches, you can access your Guardian Credit Union accounts at thousands of convenient locations nationwide. Whether you are at work, home, or your favorite travel destination, your credit union is always nearby.