1. A printer capable of forming an image on a receiver substrate according to type of receiver substrate, comprising: (a) an identifier coupled to the receiver substrate, said identifier containing identifying information uniquely associated with the type of receiver substrate; (b) a sensor disposed in sensing relation to said identifier for sensing the identifying information, so that the type of receiver substrate is identified as said sensor senses the identifying information; and (c) an image marker coupled to said sensor for forming the image on the receiver substrate according to the identifying information sensed by said sensor.