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. Trying to write a membership renewal letter but don't know where to start? New member welcome letters are the perfect way to introduce your organization, reiterate its values and mission, drum up excitement, and express your gratitude. Here is a template for a new member welcome letter you can tailor for your own association or membershipbased organization. Boost your renewal rates with a foolproof membership renewal letter! Optimize your member renewal letters to keep members coming back year after year. Read our how-to guide and download your free template. Member name embed this in the subject line or greeting (e.g.