Learn effective membership renewal letter strategies with guide and samples. Improve member retention!Trying to write a membership renewal letter but don't know where to start? Download a proof of residency letter template for family members, notarized or non-notarized, tailored for legal use. Optimize your member renewal letters to keep members coming back year after year. Read our how-to guide and download your free template. Dear Members: Several of you have reached out to us about the recent changes.