A judgment for a sum of money, or directing the payment of a sum of money, recovered upon any cause of action, may be transferred; but if it is vacated or reversed, the transfer thereof does not transfer the cause of action unless the latter was transferable before the judgment was recovered. A person who executes such a transfer without acknowledging his signature before an officer authorized to take the acknowledgment of a deed must so acknowledge it at the request of his assignee or of a subsequent assignee or of the judgment debtor upon payment of the officer's fees.
New York Legal Code