It should provide written acknowledgment of donations it receives (known as donation receipts) so that donors may claim a tax deduction for their contribution. What do you need to include in your donation acknowledgment letter?DonorPerfect helps you stay on top of receipting all year long, avoiding clerical errors and making tax time hassle-free. Donation acknowledgment letters are more than just a donor tax receipt. There are certain items to include for tax purposes. The person acknowledging the record must personally appear before the notary. Use the space below to list the items you donated to Goodwill (ie: number of bags of clothing, boxes of household goods, type of furniture, etc.). Within 90 days of the letter from the DCED the business must send proof of the contribution to the DCED. This would be the written acknowledgment from BLOCS. Download Pennsylvania 501(c)(3) Donation Receipt template, modify and send for signing using BoloForms Signature.