The document discusses the importance of gift acknowledgements and thank you letters for donor retention. It provides data that shows the most common reasons why donors stop giving, including that 13% never received a thank you and 18% felt there was poor communication. Timely and personalized thank you's are important for keeping donors engaged. A study found that donors who received a thank you within 48 hours were 4x more likely to donate again. The document provides templates and best practices for effective gift acknowledgement letters.