Lost Debit / Credit Card Numbers Page Article What to do if you suspect credit card fraud. Contact your financial institution or credit card company to cancel your card and request a new one. Check with your issuer to verify that your mailing address has not been changed. Review your transactions regularly. Make sure no one misused your card. If you still have your card but fraudulent purchases have been made, call your issuer to report the fraud and get the fraudulent charges removed.Contact the credit bureaus to let them know that fraud has occurred. A "Fraud Alert" message will be placed on your file. If you have automatic payments set up, update them with your new card number. Request a copy of your credit report and review it carefully. Check your credit report at annualcreditreport.com. Payment Processors: You can also contact payment processors who will work with you in communicating with your financial institution or national card issuer.American Express: 1-800-992-3404 (or international collect at 1-336-393-1111)Bank of America: 1-800-732-9194 (or international collect at 1-757-677-4701)Capital One: 1-800-227-4825 (or international collect at 1-804-934-2001)Chase: 1-800-432-3117 (or international collect at 1-302-594-8200)Citi: 1-800-950-5114 (or international collect at 1-605-335-2222)Discover: Customer Service at 1-800-DISCOVER (1-800-347-2683) (or international collect at 1-801-902-3100)Mastercard: 1-800-MASTERCARD (1-800-627-8372) (or international collect at 1-636-722-7111)Visa: Cardholders in the U.S. and Canada can call Visa Global Customer Care Services at 1-800-847-2911. Outside US and Canada, cardholders can call collect using the local operator 1-303-967-1096, or alternatively call your local toll-free number. For the hearing impaired, please call 1-800-TDD-1213 in the US or Canada or 1-305-278-4285 or 1-512-865-2002 in all other countries.Diners Club - Emergency Card Services at 1-800-234-6377Bank Of America - 1-800-732-9194Barclays - 1-877-523-0478USAA - 1-800-531-8722