We will break down all the steps and give you examples and even a few secret tips on how we manage to write the best thank you letters possible. I want to convey my heartfelt gratitude to all the members of the foundation who work tirelessly to make the world a better place for individuals like me.Gathered below are examples of the best donor thank you letters that exemplify both authentic gratitude and effective nonprofit fundraising at work. We are thrilled to have your support. Donors are 4x more likely to give to your mission again when you thank them within 48 hours. Send out your consolidated, year-end receipt letters. Simplify your receipting process. On behalf of the entire congregation, I would like to sincerely thank you for your time, effort and monetary donations this year. So you're saying, "Thank you Mr. Donor for making this happen in our community. We really appreciate your contribution to our nonprofit, as your generous donation will allow us to continue to forward our mission.