Gov;; In person, at any Dallas Police Substation or Headquarters. 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. A Forgery Affidavit form is primarily used when the payee's signature has been forged in the process of receiving payment through a Dallas County check. The formal complaint can be thrown out if you do not participate. How to file a formal complaint: Write a detailed letter to the PUCT describing your complaint. Arrested for an alleged forgery offense? The Law Offices of Richard C. McConathy represent clients throughout Dallas County, TX. Click Activities, then click Assignments. Click the name of the assignment you want to submit, then choose Add a file, record audio, or record video.