MIDMINNESOTA FEDERAL CREDIT UNION CONGRATULATIONS CLASS OF 2019! MMFCU members have access to over CO-OP SHARED BANCH. 5,600 Credit Unions nationwide. Detroit Lakes | (218) 844-5540 | mmfcu.org I f MIDMINNESOTA FEDERAL CREDIT UNION CONGRATULATIONS CLASS OF 2019! MMFCU members have access to over CO-OP SHARED BANCH. 5,600 Credit Unions nationwide. Detroit Lakes | (218) 844-5540 | mmfcu.org I f