A Henson Trust is a discretionary trust used in estate planning when the beneficiary receives support from ODSP. It originated from a 1987 case where the court ruled that if a trust gave absolute discretion to trustees, without any right of the beneficiary to the assets, the beneficiary would not lose ODSP benefits. Henson Trusts allow beneficiaries with disabilities to receive gifts and inheritances up to a threshold without impacting benefits, by giving trustees full control over distributions rather than vesting any rights with the beneficiary. They are an effective tool when used carefully and with honest trustees, but cannot circumvent ODSP income limits.