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Co-op Credit Union

Contact Us

Connect With Us

We appreciate hearing from you and are always available to answer questions or provide information. Please feel free to contact us in the way most convenient for you:
  • By Mail: 100 East Main Street PO Box 157, Black River Falls, WI 54615
  • By Phone: 715-284-5333 or 800-258-0023
  • By Fax: 715-284-5112
  • By Email
Please note that emails are not secure transmissions, so please do not send account numbers, social security numbers or any other information you would like to keep private to Co-op Credit Union or anyone else in an email message. Thank you.
Lost/Stolen Phone Numbers for Credit and Debit Cards

Lost/Stolen MasterCard Hotline:
24 Hours in US: (800) 808-7230
Worldwide: (727) 570-4881
Good only 7:00 am to 5:00 pm Monday - Friday US Eastern time. No long distance charge.
Lost/Stolen Debit/ATM Card Hotline:
Please call Co-op Credit Union during normal business hours at 715-284-5333 or 800-258-0023
After Hours/Weekends: (800) 472-3272

Some countries do allow toll free calls to this phone number, some do not. If your attempt fails, and it's after credit union hours, the recommended solution is phoning a family member or trusted friend stateside to report the lost or stolen card.