This letter should acknowledge the gift of stock, such as the name and number of shares. A donation acknowledgment letter (sometimes called a donation receipt or thankyou letter) is an email or paper that recognizes a charitable contribution.Create a letter similar to the sample below. Your letter should acknowledge the gift of stock, including the ticker, the number of shares, and the date of the donation. You can upload a logo, mission statement, and message that you would like to include on the acknowledgement letter. You are always welcome to designate your donation to the area or project of your choice.