Subornation of perjury is to knowingly allow or encourage another to commit perjury
Crime Of Perjury
The crime of perjury is the knowing and intentional making of untrue statements while under oath to tell the truth at a judicial or official proceeding. This is often considered being in contempt of court.
Perjury also pertains to the signing of written statements and declarations known to be untrue while signing under penalty of perjury.