The register of deeds shall perform the functions of commercial register in all matters except the registration of vessels. He shall also maintain a book of records of chattel mortgages and perform in respect to such instruments the duties prescribed in se ction two hundred and twenty hereof. [1288-1; 1900-1; 2207-1; 2496-1.] SECTION  216 . Recording of Instrument Relating to Unregistered Land. — Any instrument affecting the title of unregistered land, such as a deed, lease, mortgage, release, power of attorney, or other conveyance or contract relative thereto may, after the due  execution or acknowledgment of such instrument, be delivered for record to the register of deeds for the province or city where the land lies. Upon the presentation of any such instrument, the register of deeds shall immediately indorse thereon the true year, month, day, hour, and minute when the same was received; and from the time of the making of such notation the instrument in question shall  be constructively deemed to have been recorded, and it shall be the duty of the register as soon as practicable thereafter formally to record the instrument by extending it in full upon the proper record. The register shall also indorse upon every such ins trument a memorandum showing the volume and page wherein the instrument is so recorded. When any instrument has been thus recorded, the owner thereof shall be entitled to the custody and possession of the same; and the original instrument, the record thereof in the books of the register of deeds, or any certified copy of such record shall be  received as competent evidence in any court of justice. [496-124.] SECTION  217 . Duties of Register with Reference to Land Judicially Registered.  — A register of deeds shall have authority to make memoranda affecting the title of land registered in his district and to enter and issue new certificates and duplicate certific ates of title as provided by law, affixing the proper seal of court to the same. [1699-4.] SECTION  218 . Journal for Notation of Matters Relating to Commercial Documents . — It shall be the duty of all registers of deeds to keep a daybook in their offices in which they shall enter the hour and minute, date, month, and year of the commercial docume nts presented for registration, and the names of the persons executing said documents, as well as the name of the person presenting the same. Copyright 2012 CD Technologies Asia, Inc. and Accesslaw, Inc. Philippine Law Encyclopedia 2011 77