The DBH PIO shall issue a detailed letter acknowledging and thanking the donor for the gift, as the donor may need for tax purposes. What do you need to include in your donation acknowledgment letter?The County Board of Supervisors accepts donations and gifts offered to the County for the use, benefit and advantage of the citizens of San Bernardino County. When acknowledging these donations, include the name of the donor, the number of shares, the name of the security, and the date when the transfer was completed.