Much confusion surrounds the need to submit I751 affidavits and how to write them. We explain and provide an I-751 affidavit sample.This article provides a comprehensive sample of an affidavit letter, guiding readers through the essential components and format. An I130 affidavit is a written statement from friends, family members, or associates who can attest to the genuine nature of your marriage. An alphabeticalbytopic list is provided below containing information and downloadable PDF forms, when available, or links to external resources. An affidavit or letter can be used to fill gaps, corroborate or support other evidence or explain shortcomings or weaknesses in a petition. Affidavit of Support Format. An Affidavit of Support should include: The affiant's full name, address, birthdate, and place. General Affidavits are written statements of fact used to support your case or verify facts that are sworn to be true in front of a notary public.