Boost your renewal rates with a foolproof membership renewal letter! Trying to write a membership renewal letter but don't know where to start?A business proposal is a document you send to potential customers to persuade them to do business with you. NBAA's President and Chairman of the Board periodically send letters to members, providing updates on the association, and keeping members advised. Optimize your member renewal letters to keep members coming back year after year. Read our how-to guide and download your free template. Use a simple format for the resume you put in the body of the email: left justified, no bold, no italics, no underlines, no tabs . Learn effective membership renewal letter strategies with guide and samples. Improve member retention! Filing Period and Application Procedure Final Filing Date: Open until filled .