An image forming apparatus and a method to control the same. The image forming apparatus determines whether the object to be printed is real money. If the object is real money, the image forming apparatus prints a variety of counterfeit money discrimination information (e.g., the counterfeit money preventing pattern, the warning message, or the unique number of the image forming apparatus used for printing the money) on the back side of the copy of the money, and prints the original image of the money on the front side of the copy of the money without any change. Therefore, the image forming apparatus can color-print the original image of the money without any change, and can prevent the copied money from being used as counterfeit money.