ART.178.

ELEMENTS OF USING FICTITIOUS NAME:
1. That the offender uses a name other than his real name;
2. That he uses that fictitious name publicly;
3. That the purpose of the offender is –
   a. To conceal a crime,
   b. To evade the execution of a judgment, or
   c. To cause damage to public interest.
      Ex. Signing fictitious name for a passport

ELEMENTS OF CONCEALING TRUE NAME:
1. That the offender conceals –
   a. his true name, and
   b. all other personal circumstances; and
2. That the purpose is only to conceal his identity.

Related Article: Anti-Alias Law

using fictitious name and concealing true name