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.Craft a topnotch new employee welcome email with tips and examples to cover essential information for a smooth onboarding experience. 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. Get help drafting the welcome letters to the new members of your nonprofit organization with these two useful writing templates! Here are 10 things your welcome letter or email to new members must include plus a template that can be customized for your organization. 20 Welcome Message Examples. "We are delighted that you have decided to join us. 1. Enter the date at the top of the letter.