Maestro is an international debit card service. Maestro cards are obtained from associate banks and linked to the cardholder's current account. The cardholder presents the card at the Point of sale (POS) and this is swiped through the terminal by the assistant or the customer or inserted into a PINpad. The payment is authorised by the card issuer to ensure that the cardholder has sufficient funds in their account to make the purchase and the cardholder confirms the payment by either signing the sales receipt or enters their 4 to 6-digit PIN.