Como Enseña El Maestro

Maestro is a multi-national debit card service owned by MasterCard, and was founded in 1990. Maestro cards are obtained from associate banks and can be linked to the cardholder's current account, or they can be prepaid cards. The cardholder presents the card at the point of sale (POS) and this is swiped through the terminal by theassistant or the customer or inserted into a chip and PIN device. The payment is authorised by the card issuer to ensure that the cardholder has sufficient funds in their accountto make the purchase and the cardholder confirms the payment by either signing the sales receipt or entering their 4 to 6-digit PIN.
Within the EU and certain othercountries, Maestro is MasterCard's main debit brand and is the equivalent of signature debit card which does not require electronic authorisation, similar to the Visa Debitcard. In most other countries, Maestro is equivalent to a Visa Electron and is MasterCard's tertiary card. It requires electronic authorisation much like a Solo debit card,i.e. not only must the information stored in either the chip or the magnetic stripe be read, this has to be sent from the merchant to the issuing bank, the issuing bankthen has to respond with an affirmative authorisation. If the information is not read, the issuer will decline the transaction, regardless of any disposable amount on theconnected account. This is different from other debit and credit cards, where the information can be entered manually into the terminal (i.e. by punching the 13 to 19 digitsand the expiry date on the terminal) and still be approved by the issuer or stand-in processor.
Maestro is accepted at around twelve million point of sale outlets.[1][2]