To create a 501(c)(3)-compliant receipt with Donorbox, simply log in and use our easy template editor. What to include in donor acknowledgment letters?What do you need to include in your donation acknowledgment letter? Charitable contributions are generally taxdeductible if you itemize. To claim your tax-deductible donations, you'll fill out the Schedule A on your return. Nonprofit organizations may qualify for exemption from some Florida taxes. Each tax is separate and distinct and has its own requirements. Non-cash donations also need supporting records. The charity must still provide the written acknowledgment to the donor. Standard 501 (c)(3) for donations.