Use our I130 affidavit sample and tips to create a strong affidavit for your spouse. Include these key points and avoid common mistakes.Much confusion surrounds the need to submit I751 affidavits and how to write them. We explain and provide an I-751 affidavit sample. An affidavit of marriage is a legal document and a sworn statement to verify that two people are married. Here's a step-by-step process for how to write an affidavit whether you need a short or long-form template. Our family immigration law attorney is committed to keeping families together. A request form will need to be filled out upon arrival. We will call you when your documents are ready to be picked up. Salt Lake SBIRSTTR Resource Center. 100. 457.