Debit Cards

To report a lost or stolen MasterCard Debit Card call:
Inside the US: 1-800-293-5294

To dispute a debit card transaction, call:
1-888-918-7313

Credit Cards

To report a lost or stolen MasterCard Credit Card call:
Inside the US: 1-800-449-7728
 
To dispute a credit card transaction, call:
1-800-654-7728

You can also report your lost/stolen credit cards via Online Banking under View My Credit Card.