A gift acknowledgment letter weaves together your nonprofit's appreciation, engagement, and compliance efforts following a donor's generosity. What do you need to include in your donation acknowledgment letter?Gift acknowledgement letters are important for two reasons. First, they provide proof so donors can claim a US tax exemption. Include the nonprofit's EIN so the the donor can to check the charity's tax-exempt status with the IRS. First paragraph: Immediately thank donors for their gift. PlumBenefits is the leading Corporate Entertainment Benefits provider, offering exclusive discounts, special offers and access to preferred seating and tickets. Maximize your success this 4th quarter with effective marketing strategies and payment schedules. Finish the year strong!