Gasoline stations have started using machines and markers to detect counterfeit bills and avoid being the victims of fraud, in reaction to recent reports that false RD$2,000 and RD$100 bills are in circulation. Employees are being instructed to take precautionary measures and not to accept bills unless they are certain they are legal. Most businesses have not yet registered cases of counterfeit bills in the last few days. Listin Diario visited several stations on 30 de Marzo, San Martin, Lope de Vega and Tiradentes avenues and found that all are on the alert for these bills.