"Fabricate" is related to this verb that can mean to write something fraudulent, like a signature
[DOC] [TLE] Forgers - definition of forgers by The Free Dictionary [PAR] Related to forgers: forged ... To give form or shape to, especially by means of 
careful effort: forge a treaty; ... (Metallurgy) to make or produce a fraudulent 
imitation of (a signature, ... Middle English < Old French forgier < Latin fabricre 
to fashion; see fabricate] ... you will forge ..... Write what you mean clearly and 
correctly