How To Write A Good Letter Of Inquiry For Grant . Put the same date on the cover letter that is on the completed grant application. Many foundations require you submit a letter of inquiry (loi). Donation letter template from www.bizzlibrary.com Kumar, we are an ngo, helping hands working for the upliftment of downtrodden and poor children belonging to various slums in the city. Patience is necessary to get a useful response. Below is the email sample of grant application letter for your reference.