We strive to provide the best service for our members. Please take a moment to fill out the form below to let us know how we are doing.
Please feel free to contact us.
302 W Upham St.
PO Box 279
Marshfield, WI 54449
715-387-8686
800-818-5049
mmccu@mmccu.com
DO NOT INCLUDE ANY SENSITIVE PERSONAL INFORMATION IN EMAIL
For lost or stolen debit cards
800-543-5073
For questions on your VISA® credit cards
Customer Service
866-234-4691 (US)
701-461-1772 (International)
Fraud Department
800-558-3424
