Code of Civil Procedure § 989

When a judgment is recovered against one or more of several persons, jointly indebted upon an obligation, by proceeding as provided in Section 410.70, those who were not originally served with the summons, and did not appear in the action, may be summoned to appear before the court in which such judgment is entered to show cause why they should not be bound by the judgment, in the same manner as though they had been originally served with the summons.