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.