The account holder MUST provide an Affidavit of Forgery before any criminal charges can be filed! An affidavit must accompany each forged or counterfeited item.Affidavit of Check Forgery - Complete, print, sign and mail this form to Star One Credit Union per instructions below. Please select the appropriate box: Signature Forged: My signature on the face of the check(s) listed below is a forgery. 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? Client "A" signs an affidavit stating his partner client "B" has forged checks to himself and deposited them into his own private account. I got a letter in the mail from Discover asking me to fill out an affavadit regarding the fraud on my account two months ago. Court Forms, Free forms are available for those actions that only require the single form to be filed on an existing case.