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 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? Affidavit of Check Forgery - Complete, print, sign and mail this form to Star One Credit Union per instructions below. Forms on this page are always up to date. 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. This affidavit is for victims of identity theft. To avoid delays do not use this form if you have already filed a Form 14039 for this incident.