A good welcome letter acts as a travel guidepointing members to key resources, highlighting benefits, and outlining simple next steps. 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. First, for the privilege you have given us to share in the education of your children with you, our parents, as their primary educators. Here are 10 things your welcome letter or email to new members must include plus a template that can be customized for your organization. 1. Enter the date at the top of the letter. Get help drafting the welcome letters to the new members of your nonprofit organization with these two useful writing templates! Get ready for a phenomenal school year with our backtoschool parent letter email template. Welcome to the Team Telomere Board of Directors!