The problem of authorshipSignatures on prints are inconsistent and cannot be used as proof of authenticity. Names can be added to later states (each set of impressions from an additional working of the plate is a new state). Furthermore, most prints are the result of a partnership between a designer, a plate cutter, an inker, a publisher… which role deserves to get the credit? Which has more impact on the viewer’s appreciation of the image?
These various aspects of the printing process have been codified into specific terms that help distinguish collaborators: Fecit or Delineavit follows the name of the etcher or engraver, whereas Invenit refers to the designer of the composition. The publisher is often identified by the term Excudit.