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. Do you want new ways to welcome members into your church? Check out these top church membership welcome letter templates and best practices. Discover expert tips on writing the perfect welcome letter to new employees, complete with customizable templates for a personalized touch. 1. Enter the date at the top of the letter. Learn the latest best practices for welcoming new patients with a new patient welcome letter for your therapy practice. A good welcome letter acts as a travel guidepointing members to key resources, highlighting benefits, and outlining simple next steps. Get help drafting the welcome letters to the new members of your nonprofit organization with these two useful writing templates!