Credit Card Customer Service

 

Credit Card Activation

 

Lost or Stolen Credit Card

 

Call: 866-820-3947
Within the United States
24 hours a day, 7 days a week

 

Call: 00 + 1 + 314-542-7111
Call collect from anywhere globally

Credit Card Payment Mailing Address

Mastercard®
P.O. Box 71050
Charlotte, NC 28272-1050