This (usually optional) letter may be used to convey information that is pertinent to the review of the proposal. Make sure you identify your name, the University of Michigan, project title, RFP or and specific funding mechanism if any. Depending on sponsor’s regulations, this letter may be used to request a reviewer or a specific study section with special expertise in your field, or to identify conflicts with potential reviewers. Sometimes this letter is used to explain special circumstances, ., budget outside of limits, missed deadline, unique subawards, request to send in delayed preliminary data results before review date. State if you have attached any special approval documentation pertaining to any of the above.