The Forest Service may consider accepting donations through the National Forest Foundation (NFF). Under the act that created the NFF, the purpose of the NFF includes accepting private gifts of money for the benefit of, or in connection with, the activities and services of the Forest Service (16 USC 583j).
There are a number of other non-profit organizations which work closely with the Forest Service to help accomplish the mission of the agency. These non-profit partners provide another avenue in which private gifts can be made to support programs, activities or services of the Forest Service.