Send a welcome letter to the new board member once appointed. 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. Onboarding new board members takes a good bit of work. Read this guide to learn how to properly welcome new board members to the team. Send welcome letter to newly elected board members nonprofit via email, link, or fax. You can also download it, export it or print it out. Start with a warm welcome letter from the board chair or the executive director. Congratulations on recruiting your new board members. You now have the brightest and most experienced people in one room — be it physical or virtual.