| Mercury Payment Systems | 800-846-4472 |
| Sterling Payment Technologies | 800-383-0561 |
| MPS Access | 212-931-5180 |
| Concord / EFS | 800-733-3322 |
| FDMS - CardNet (North) | 800-762-6663 |
| FDMS - Envoy (Nashville) | 800-647-3722 |
| FDMS - Omaha (Central) | 800-762-6663 |
| FDMS - NaBanco (South) | 800-326-7985 |
| Global Payment Systems - Atlanta (NDC) | 800-622-2315 |
| Global Payment Systems - MAPP | 800-247-1706 |
| Global Payment Systems - Modular Data | 818-579-4357 |
| American Express | 800-528-0682 |
| Elavon (Nova) | 800-226-9332 |
| Paymentech | 800-354-8893 |
| Vital (TSYS) | 800-552-8227 |
| Alliance Data (SPS) | 800-767-5258 |
| NPC | 800-627-8008 |
| Lynk Systems | 800-859-5965 |
| Equifax | 888-407-0359 |
| Telecheck | 800-456-4151 |
| CheckTronic/XpressCheck | 800-642-4325 |