Revised Penal Code Article 178 – Using fictitious name and concealing true name
The penalty of arresto mayor and a fine not to exceed 500 pesos shall be imposed upon any person who shall publicly use a fictitious name for the purpose of concealing a crime, evading the execution of a judgment or causing damage.
Any person who conceals his true name and other personal circumstances shall be punished by arresto menor or a fine not to exceed 200 pesos. (Restored by EO No. 187.)