Much confusion surrounds the need to submit I751 affidavits and how to write them. We explain and provide an I-751 affidavit sample.Use our I130 affidavit sample and tips to create a strong affidavit for your spouse. Include these key points and avoid common mistakes. An affidavit letter for immigration marriagebased cases is a legal document that verifies the authenticity of a marital relationship between two individuals. Dear Community, Could someone kindly provide a sample of a sworn affidavit? We are thinking of submitting some proof of bona fide marriage. Can anyone recommend a good witness affidavit template that we could use? You need a single status affidavit if you plan to marry in a foreign country.