We're so happy to welcome you to the family! I wanted to share an open letter to my future daughter in law.A "thank you for joining" membership letter should include a personalized greeting to the new member. Use the member's first name in your salutation. Here are 10 things your welcome letter or email to new members must include plus a template that can be customized for your organization. Local Forms, Adoption Forms, Family Law Forms, Juvenile Forms, Probate and Court Investigator's Forms, Small Claims Forms, Traffic Forms A good welcome letter acts as a travel guidepointing members to key resources, highlighting benefits, and outlining simple next steps. Do you want new ways to welcome members into your church? Check out these top church membership welcome letter templates and best practices. 1. Enter the date at the top of the letter.