In this article, we discuss how to write a letter with two signatures and provide an example letter for you to use as a reference. A cover letter serves as an introduction to your resume.There are two types. Character references: should be US citizens and must be Nassau County residents who have known the applicant for a minimum of 1 year. Electronic signatures are not acceptable. For help in completing this form, click on the yellow question marks for instructions. Submit an original letter with a signature from the U.S. Department of Veterans Affairs (VA) confirming your service-related disability.