A formal letter for a membership typically follows a professional format and includes specific information related to the membership application or request. Include a sample letter of recommendation template, highlighting key sections with examples.Support for K-12 children and families with enrollment, registration, and school placement in the District. Dear Beverly Staib,. Sample letters from the Department of Revenue, sent to businesses or taxpayers who wish to enter into a payment agreement for back taxes. The Philadelphia Student Mediamaker Fund awards grants to Philadelphia area student media makers who want to produce a digital video or audio project.