Verify statements for legal matters and business transactions using our Illinois general affidavit form template. 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. You're from a lowfraud and you have good primary evidence, then add in a few photos and you're good to go. You really don't need the affidavits. CitizenPath has prepared a downloadable I751 affidavit sample that you can forward to friends who are willing to write a letter of support. You write a DECLARATION, under PENALTY OF PERJURY and state in the beginning: I JANE SMITH, DECLARE: 1. The financial sponsor can also use assets (not just income) to meet these requirements.