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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 Phone: 800-258-0023 or 715-284-5333 
  • By Mail: 100 East Main Street PO Box 157, Black River Falls, WI 54615
  • By Fax: 715-284-5112
  • By Email
Please note: 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.
If you currently are a CCU member, you can send secure messages to us through CCU Online and CCU Mobile.
  • In CCU Online, log in and click the "Message Center" link in the upper right of the screen. Then, click "New" and a form will appear allowing you to type and send your secure message.
  • In CCU Mobile, log in and select "Messages" from the main menu. Then, touch the pencil icon in the lower right to compose a message. Type your subject and message in the fields and send.
Lost/Stolen Phone Numbers for Credit and Debit Cards

Lost/Stolen Credit Card 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: 855-961-1602

Please note, card hotlines may be experiencing increased wait times due to COVID-19.

Lost/Stolen Debit 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