In this blog article, we explain the purpose of an immigration recommendation letter and offer guidance on writing an effective one. This section discusses basic eligibility criteria and guides you through filling out and filing the application.We will cover how to write an immigration support letter on this page, but it can be helpful to work with a knowledgeable immigration attorney. A cover letter is a comprehensive list of all the documents and all the supporting evidence that you are including in your application packet. Provide specific examples like sharing experiences you have had with the applicant that demonstrate their integrity and positive character traits. If you are a U.S. citizen, you must file a separate Form I-130 for each eligible relative. You may file Form I-130 for: A. Your spouse;. Select from a variety of USCIS cover letter templates and examples based on the immigration application or petition. This article explains what a cover letter is and the elements it should include. It also includes a template you can use to write your own.