Complete and mail the Stock Donation Letter of Intention. To begin the process of donating stock, please complete the Stock Donation Letter of. Intention.A donation acknowledgment letter (sometimes called a donation receipt or thankyou letter) is an email or paper that recognizes a charitable contribution. This letter should acknowledge the gift of stock, such as the name and number of shares. How will my stocks be valued? A: We will issue an acknowledgement letter indicating the high and low prices for the security on the date of its transfer to us. What do you need to include in your donation acknowledgment letter? Fill out our Online Stock Gift Notification Form. 2. Complete the Electronic Transfer Authorization Form (PDF) and provide it to your broker.