Applicable law is Sec. 109 of PD 1529, to wit:
Section 109. Notice and replacement of lost duplicate certificate. In case of loss or theft of an owner's duplicate certificate of title, due notice under oath shall be sent by the owner or by someone in his behalf to the Register of Deeds of the province or city where the land lies as soon as the loss or theft is discovered. If a duplicate certificate is lost or destroyed, or cannot be produced by a person applying for the entry of a new certificate to him or for the registration of any instrument, a sworn statement of the fact of such loss or destruction may be filed by the registered owner or other person in interest and registered.
Upon the petition of the registered owner or other person in interest, the court may, after notice and due hearing, direct the issuance of a new duplicate certificate, which shall contain a memorandum of the fact that it is issued in place of the lost duplicate certificate, but shall in all respects be entitled to like faith and credit as the original duplicate, and shall thereafter be regarded as such for all purposes of this decree