Here are 10 things your welcome letter or email to new members must include plus a template that can be customized for your organization. Many proposals require or allow letters from your institution, administrators, partners, and collaborators.Download one of the sample letters below and personalize it for your school or district. Principal letter: Back to school (updated April 2023). Welcome to Washington State Courts. Boost your renewal rates with a foolproof membership renewal letter! The following activities and information take you through the instruction, forms, and art of letter writing as provided through letters in the APS collections. If you disagree with an individual or a company, and informal efforts to resolve your dispute fail, you should write a demand letter.