Answer:
Because the participant would have to provide something of value to enter -- a deposit account at your bank and a purchase using the debit card -- it would be considered an illegal lottery under federal law.
To make it a legal sweepstakes, if permitted under state law, you would have to provide non-customers an opportunity to enter the drawing with an equal chance to win, at no cost.
First published on BankersOnline.com 1/10/11