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.Trying to write a membership renewal letter but don't know where to start? Optimize your member renewal letters to keep members coming back year after year. Read our how-to guide and download your free template. Here are 10 things your welcome letter or email to new members must include plus a template that can be customized for your organization. The Coalition supports both families and child care providers. Quick access to Development Services documents, deadlines, meeting dates, fees and more. Want to learn how to write a reference letter for an apartment? Keep reading for tips on how to write a good reference letter and templates.