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.The (Name) PTA would like to take this opportunity to welcome you to our wonderful little school, nestled near the heart of historic (my town). We are excited to welcome new and experienced staff members to the BPES family: Marie Mencher, PT Music Teacher. Chris Corvelli, PE Teacher. Here are 10 things your welcome letter or email to new members must include plus a template that can be customized for your organization. These letters introduce the teachers and provide basic information on how the parents can best engage with the learning experience. 1. Enter the date at the top of the letter. Your Welcome Letter should actually be from the person doing the welcoming. 1. Enter the date at the top of the letter.