More than 400 million debit cards worldwide carried the PIN-based Maestro brand at September 30, 2021. Mastercard, which created Maestro in 1991, wants to migrate issuers to Debit Mastercard cards and has spent two years working with issuers to bring that about. Maestro cards in Europe, Latin America, Asia and the Middle East-Africa will continue to be supported in the near term. Issuers have the choice of migrating to Debit Mastercard or converting their portfolio to Visa. With the exception of cards issued in Latin America, Maestro cards carry 19 digits, making them awkward for use onl...