An affidavit of forgery is an official declaration that a fraudulent act was committed. It should be completed, notarized, and sent to notify institutions.This affidavit is made voluntarily for the purpose of establishing the fact that my signature is a forgery. 7. Do you know who forged your signatures? The employee completes the Affidavit of Forgery and has it notarized. The employee should not sign or complete the bottom portion until in front of the notary.