This document is an acknowledgement receipt for the sale of a motor vehicle from a seller to a buyer. This letter acknowledges receipt of your appeal on date.An Appeal Coordinator will begin the research and be in touch with you. The ​GSA Office of Fleet Management is pleased to share a webinar on the acknowledgement of receipt for agency purchased vehicles. Notice and Acknowledgment of Receipt (FL-117). Your computer must have the Adobe Acrobat Reader installed in order to view any of these documents.