Use our I130 affidavit sample and tips to create a strong affidavit for your spouse. Include these key points and avoid common mistakes.I am about to file for my husband and need sample of affidavit of third parties acknowledging the marital union. Does the affidavit have to be from each person? Use the sample I751 affidavit as an example. Remember that each letter is unique and should contain elements that are personal to your story. Learn about marriage affidavits for immigration, legal, and insurance needs.