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.Send a short "Welcome to the team" message to let new employees know how excited you are to have them. Here's how to make the best first impression. Do you have a new team member starting soon? Learn how to write a welcome aboard letter or email and review sample letters for inspiration. "Welcome aboard, it is a pleasure to have you join our team. Let us create magic. Here are 10 things your welcome letter or email to new members must include plus a template that can be customized for your organization. Learn how to create engaging, onbrand welcome emails that convert.