Martinsburg, W.Va. (AP) -- Martinsburg police are warning merchants deep in the holiday shopping season not to be taken in by a new twist on counterfeit cash.
Lt. Gary Harmison says counterfeit bills are being used in the area that can pass initial attempts to detect if they're real.
Harmison says the counterfeiter is bleaching real $5 bills and reprinting them as $100 bills.
Because real money is being used, the markers that cashiers routinely use to check if bills are valid won't show the currency is counterfeit.
Harmison says businesses should check the hologram and security strip in the bill to make sure it matches the printed denomination.
(Copyright 2009 by the Associated Press. All rights reserved.)