And I am 18 years of age or older. An affidavit of nonprosecution accusing can help a witness looking to avoid a trial.Contact our Collin County criminal lawyers. There isn't always a form to fill out. You can contact their office and make sure they know your wishes. How to file an affidavit of non prosecution in Texas? Find Your Court Forms. You will need to contact the Assistant District Attorney in charge of his cases. He or she will have the ANP (affidavit of non-prosecution) to sign. Was wondering in ga is there a form of affidavit for non prosecution.