How To Write A Letter To Immigration About Marriage . I am submitting this recommendation letter in support of mary johnson’s application for permanent citizenship in the u.s.a. I have known (name of one or both of the married couple) since (the date that you met) when (he, she, or they) moved into our neighborhood. Marriage Reference Letter Sample, Example in Editable Format from getrecommendationletter.com Here, highlight the points in support of the candidate that he has to prove to. Name, date of birth of principal applicant (sponsored spouse) names, dates of birth, ages of any dependent children (dependents) immigration class you are applying under (family class). The subject line specifies what the letter is and who it regards.