N.Y. General Obligations Law § 5-1105: Written promise expressing past consideration

§ 5-1105. Written promise expressing past consideration. A promise in

writing and signed by the promisor or by his agent shall not be denied

effect as a valid contractual obligation on the ground that

consideration for the promise is past or executed, if the consideration

is expressed in the writing and is proved to have been given or

performed and would be a valid consideration but for the time when it

was given or performed.