For completed examples of some legal forms, see our Self Help Form and Sample Packets page. Handwritten forms are hard to read.This article provides a comprehensive sample of an affidavit letter, guiding readers through the essential components and format. I am competent to testify as to the matters set forth herein and if called as a witness would testify as set forth below. If you ever need a document filled out or one notarized, call Cory at Trusted Documents and she handle all the rest! Verify statements for legal matters and business transactions using our California general affidavit form template. The proof of residency letter is a sworn statement attesting to the fact that a person really lives at a particular address. You can mail in the completed form to our office. You may complete the fillable form and print, or print and then complete the form.