I want to convey my heartfelt gratitude to all the members of the foundation who work tirelessly to make the world a better place for individuals like me. 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. Optimize your member renewal letters to keep members coming back year after year. Read our how-to guide and download your free template. How do I get a membership card? Start your letter off strong with a greeting. This article will discuss some common sample letters that you can use when communicating with your tenants. We'll also provide templates for each letter. Here are 10 things your welcome letter or email to new members must include plus a template that can be customized for your organization.