Do you want new ways to welcome members into your church? Check out these top church membership welcome letter templates and best practices.Below is a sample letter for your hospitality team as they welcome new members to the church. Here are 10 things your welcome letter or email to new members must include plus a template that can be customized for your organization. We've built a complete kit of templates to help you get started on building a comprehensive welcome packet for newcomers. 1. Enter the date at the top of the letter. What to include in a church welcome letter. 1. Brevity: Be Concise. 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.