This affidavit is made voluntarily for the purpose of establishing the fact that my signature is a forgery. Do you know who forged your signature?This form must be notarized. Each authorized user must complete a separate Affidavit form. This forgery affidavit is to be used for forged share drafts that have cleared a member's account and forged share drafts that have been cashed against. It is NEVER advisable to alter a notarized document and is likely illegal. An "Affidavit of Forgery" is a notarized, sworn statement, attesting that the signature appearing on it is indeed a forgery.