Writing a donation letter for school can be daunting, but with these free templates, you can send the right message in no time. Use one of our donor letter templates.Customize them to fit your brand, then send them to prospective donors for your next fundraising event. 1. Enter your school's letterhead and the current date. It is helpful to craft a donation letter asking for their support. Giving receipts is an important practice since 501(c)(3) donations are tax-deductible to the donor. Our sample form provides an easy way to get started. TEMPLATE: Donation Letter. For use in Grant V. Resources. Sometimes,l you may want to ask the public directly for donations.