24/7 Support
(800) 694-7999
Voice Authorization Center
For Visa and MC merchant account numbers beginning with 5230
call 1 (800) 228-1122
For Visa and MC merchant account numbers beginning with 6318
call 1 (800) 291-4840
AMEX Support
(800) 528-5200
AMEX Voice Authorization
(800) 528-2121
Discover Support
(800) 347-2000
Discover Voice Authorization
(800) 347-1111