[Organizers] anonymous donations

Hi, At a recent board meeting the subject of how to handle anonymous donations came up. We are wondering how other organizations handle the issue of who on the board knows who the donor is. How do you record the information and where is that information stored so as to protect the anonymity of the donor? Thanks, Orin Nisenson Vice-Chair Friends of the Guiding Star Grange. PS: We are a 501(c)(3) organization -- U.S. Virgin Islands Snow Plowing Service. Serving St. Croix, St. Thomas & St. John. Fast reliable service, driveways & parking lots / no job too small or large