Maria Adams, Credit Cards Moderator
@m_adams
You can contact the Mastercard customer service by calling (800) 627-8372. Alternatively, you can contact your card’s issuer by calling the number you see on the back of your card. To report a lost or stolen credit card, call the number mentioned above or your issuer’s customer service department.
You should also keep in midn that Mastercard is not an issuer, so for further inquiries, you'll have to contact your financial institution. You can visit Mastercard's website and select the bank that your card is issued by.
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