You searched for: “allography”
allography (s) (noun), allographies (pl)
Writing another individual's signature: An allograph can simply be the opposite of an autograph; that is, it is a person's words or signature, written down by someone else.
This entry is located in the following units: allo-, all- (page 5) grapho-, graph-, -graph, -graphy, -grapher, -graphia (page 3)