The present invention relates to a method in a computer for creating an electronic document to be printed, said document comprising a page description representing a layout of the document, said method comprising: retrieving a license from a database, said license defining a position-coding pattern, which is capable of encoding positions on a product when printed, selecting at least a portion of the position-coding pattern in the retrieved license to be associated with the page description, forming a sublicense from said license, said sublicense comprising a definition of the selected at least portion of the position-coding pattern, an indication of an origin of the sublicense to enable assuring that the sublicense stems from a trusted actor, and a data record allowing verification of integrity of the sublicense to enable assuring that the sublicense has not been tampered with, and associating said sublicense with said page description. The invention also relates to a method for verifying a sublicense to a portion of the position-coding pattern.