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
  • Via 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. Thanks. 
     
    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.
  • 24 Hour Worldwide Customer Service:  (608) 836-2613 
     
    Lost/Stolen Debit/ATM Card Hotline: 
    Please call Co-op Credit Union during normal business hours. 
    After Hours/Weekends:  (800) 554-8969 
    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. 


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