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honorary trust

n. (context legal English) A device by which a person establishes a trust for which there is neither a charitable purpose, nor a private beneficiary to enforce the trust (such as a trust for the care of pets or maintenance of cemetery plots), for which trustee is bound by honor, but ''not'' by law, to carry out the wishes of the trustor.

Wikipedia
Honorary trust

An honorary trust, under the law of trusts, is a device by which a person establishes a trust for which there is neither a charitable purpose, nor a private beneficiary to enforce the trust. While such a trust would normally be void for lack of a beneficiary, many jurisdictions have carved out two specific exceptions to this rule: trusts for the care of that person's pets; and trusts to provide for the maintenance of cemetery plots.

The name of the device derives from the lack of any beneficiary legally capable of enforcing an honorary trust: the trustee is bound by honor, but not by law, to carry out the wishes of the creator of the trust.

Like many states, New York has only recently allowed such trusts by statute.