Donors are 4x more likely to give to your mission again when you thank them within 48 hours. This article will help you write a thoughtful and engaging thank-you letters for your donors.Write an excellent thank you letter for donations. Get tips and best practices, plus three inspiring samples and ready to use templates! It can be hard to find the right words to express your gratitude. We have some tips to help you write to the family of your organ donor. 1. Visit the Penn Giving website. 2. Select the fund you'd like to support. 3. Donors need to be appreciated too. If you want some guidance, check out our donor thank you letter templates for any organization!