Merchant Inquiries

Q: I Need to Report Potential Fraud

A: If you possess contact information for someone who has committed fraud on a MasterCard account, please contact your merchant service provider for assistance in reaching the financial institution who issued the MasterCard account.

Q: I Would Like To Accept MasterCard For Payment

A: To accept MasterCard for purchases, you must enter into an agreement with a financial institution that is set up to process transactions with MasterCard. Although we cannot advise you in the selection of a financial institution, if you click on the URL listed below, we do provide some good information on how to begin.

Q: Questions not answered here

A: If your question is not listed among the previous topics and questions, your best option is to contact the financial institution that issued your account as only they hold account specific and unique information. Typically there is a customer service number for your financial institution on the back of each card that you can call. You can always contact the MasterCard Assistance Center toll free at 1-800-307-7309 or 'Collect' by dialing 1-636-722-7111.
If you believe that your question can only be answered by MasterCard:

If you believe that your question can only be answered by MasterCard, Click here to submit your question.