Use the sample I751 affidavit as an example. Remember that each letter is unique and should contain elements that are personal to your story.This legal document serves as a testament to the bona fide nature of a couple's marriage, often a deciding factor in immigration cases. An I130 affidavit is a written statement from friends, family members, or associates who can attest to the genuine nature of your marriage. This article will demystify the Affidavit of Support, breaking down its purpose, requirements, and implications. The Absentee Affidavit is to be completed if an applicant is unable to appear personally before the County Clerk to apply for a marriage license.