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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:
During regular business hours, call: CCU at 800-258-0023

After regular business hours, call: 800-325-3678
To dispute a charge or charges on your MasterCard, call: 800-600-5249
To contact the fraud department to verify transactions, call: 800-369-4887

Lost/Stolen Debit/ATM Card Hotline:
Report a card lost or stolen or for questions about the card account: 844-269-3473

Initiating a dispute for fraud or non-fraud transactions: 844-269-3488