
Founded in 1990, Maestro is a multi-national debit card (or "bank card") service owned by MasterCard. Maestros are linked to the card holder's current or checking account, or may even be sold as simple prepaid cards.
Within the European Union and a few other countries, Maestro does not require electronic authorisation with use and is one of the EU's favorite cards of any type. Maestro is today accepted at around 11 million outlets and at essentially every online casino -- provided you're not a U.S. citizen.
More information is available at:
http://www.maestrocard.com/