And I am 18 years of age or older. I asked the DA if I could file an affidavit of non prosecution and he said no.Finding yourself entangled in legal proceedings can be daunting. How do I file an affidavit for nonprosecution without a lawyer, for a domestic violence case? My name is__________________________ and I am the complainant against. Who is charged with the offense of. An affidavit of nonprosecution is a powerful tool that can potentially alter the course of a criminal case.