National Internal Revenue Code (NIRC)
Section 188. Stamp Tax on Certificates. - On each certificate of damages or otherwise, and on every certificate or document issued by any customs officer, marine surveyor, or other person acting as such, and on each certificate issued by a notary public, and on each certificate of any description required by law or by rules or regulations of a public office, or which is issued for the purpose of giving information, or establishing proof of a fact, and not otherwise specified herein, there shall be collected a documentary stamp tax of Fifteen pesos (P15.00).