Include the nonprofit's EIN so the the donor can to check the charity's tax-exempt status with the IRS. A gift acknowledgment letter weaves together your nonprofit's appreciation, engagement, and compliance efforts following a donor's generosity.What is required in a donation acknowledgement letter? What do you need to include in your donation acknowledgment letter? Thank you for your recent gift to the Parallel Laboratory in the Department of Electrical Engineering and Computer Science. As you know, this important. Acknowledgment of "no goods or services were provided as part of this donation. For best results, write a personal acknowledgment letter with a receipt that includes the IRS-required elements. Many churches and charities wish to go further in their written acknowledgment and include a statement that donations are taxdeductible. Use this gift agreement template as a starting point to document what your donor expects and what your nonprofit is committed to providing.