Law Enforcement

Law Enforcement Inquiries

Q: We are investigating a fraud case and need to contact MasterCard to assist with the investigation. Who can we speak with?

A: Please send an email to our Law Enforcement Support Center at Law_Enforcement_Support@mastercard.com, or call 1-866-308-7272 (U.S. & Canada) or 1-636-722-4046 (International). We will respond to your inquiry within 24-48 hours.

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.
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