| Abbreviation | Definition |
|---|---|
| MFCU | Missoula Federal Credit Union |
| MFCU | MIT Federal Credit Union |
| MFCU | Montrose Federal Credit Union |
| MFCU | Muskogee Federal Credit Union |
| MFOEL | Multi-Featured Open-End Lending |
| MI | Members Interests |
| MMEFCU | Memphis Municipal Employees Federal Credit Union |
| MPF | Mortgage Purchase Facility Agreement |
| MSCU | Mennonite Savings Credit Union |
| MSCU | Metropolitan Services Credit Union |
| MSCU | Michigan Services Credit Union |
| MSCU | Mutual Savings Credit Union |
| MSCU | Mutual Security Credit Union |
| MSEFCU | Marion School Employees Federal Credit Union |
| MSMFCU | Main Street Members Federal Credit Union |
| MSUFCU | Michigan State University Federal Credit Union |
| NACCUN | National Association of Cooperative Credit Unions of Nigeria |
| NAFCU | National Association of Federal Credit Unions |
| NASCUS | National Association of Credit Union Supervisors |
| NBCU | Norristown Bell Credit Union |