Learn our top 15 tips for writing the perfect thank you letter, browse inspiring samples, and get your hands on readytouse templates you can customize. Donors are 4x more likely to give to your mission again when you thank them within 48 hours.Donors need to be appreciated too. If you want some guidance, check out our donor thank you letter templates for any organization! Thank you notes for nonprofits are vital. There are obvious benefits and some bonus benefits. Automatically email branded gift acknowledgements, populated with the donor and gift data of your choice when online donations are made. I want to thank the kind, happy, and giving in a quick letter. Dear 'Fill the Flyer' donor,'. We would like to thank you and welcome you into the Manitou Heights Society.