Your qualifications to write a letter of recommendation for immigration depend on your relation to the applicant and the purpose of the recommendation letter. In this blog article, we explain the purpose of an immigration recommendation letter and offer guidance on writing an effective one.It highlights some of the main points of emphasis judges look for. Use a business style form. Introduce yourself, then write why you are writing the letter. An immigration reference letter is a character reference that you provide to support another party's immigration application. To begin the student visa application process, the student must be accepted into an SEVP-approved school in the US and receive an Acceptance Letter.