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.Trying to write a membership renewal letter but don't know where to start? Do you want new ways to welcome members into your church? Check out these top church membership welcome letter templates and best practices. (1) All attorneys must use the court's E-Filing system. All cases, except for those listed below, are designated as E-File cases. Here are 10 things your welcome letter or email to new members must include plus a template that can be customized for your organization. Please enter your address and select from the drop down. Boost your renewal rates with a foolproof membership renewal letter!