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. Ask them that question. Letter to my new daughter in law. Discover Pinterest's best ideas and inspiration for Letter to my new daughter in law. Do you want new ways to welcome members into your church? Check out these top church membership welcome letter templates and best practices.