And I am 18 years of age or older. How do you file an affidavit for non prosecution in pa?My mom's boyfriend and I got into a verbal altercation he picked. 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. 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? 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? Introduction to representing yourself in Pennsylvania.