N.Y. Real Property Law § 412: When a transfer is deemed to be registered

§ 412. When a transfer is deemed to be registered. Every transfer of

registered property shall be deemed to be registered under this article

when such document has been filed of record, in the office of the

registrar of the county where the property is located and a serial

number and certificate number assigned to the instrument; all other

dealings shall be considered as registered when the document has been

filed of record in the office of the registrar of the county where the

property is located and a serial number and certificate number has been

assigned the instrument.