How To Write A Character Waiver Letter For Immigration . Do not make your letter emotional; Here, highlight the points in support of the candidate that he has to prove to the immigration officials. Immigration Support Letter Example For Your Needs Letter Templates from diabetescured.biz To whom it may concern: The main body of the waiver letter for immigration explains why a waiver is justified. Once the waiver is approved by the uscis, the applicant should receive a packet of information from the u.s.