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? There is no set form or format of an affidavit of nonprosecution in Texas. How do i go about filling out an affidavit of non prosecution? Is there a form i can fill out or a certain wording required? To fill out this affidavit, you'll need to provide your personal information, details about the incident, and your desire to withdraw the charges. And I am 18 years of age or older. An affidavit of nonprosecution is a sworn document in which the plaintiff expresses their desire not to prosecute the case or participate in the prosecution.