Filling out an affidavit of non-prosecution in Texas is pretty straight-forward. It should state that the victim doesn't want to cooperate or prosecute.How to file an affidavit of non prosecution in Texas? An Affidavit of NonProsecution is a pretty standard form. In fact, a few Texas courts even provide a blank affidavit that you can fill out. And I am 18 years of age or older. This document is an affidavit for non-prosecution in a criminal case in Texas. An Affidavit of NonProsecution is a statement from the alleged victim of a crime saying they don't want to press charges. For Appearance in writing you must fill out a Plea Sheet along with an Information Sheet. Below are the required documents for you to download.