California Substitution Attorney is a legal professional who can represent a client in the court of law when the original attorney is unable to do so. This includes cases in which the primary attorney has become incapacitated, died, or is otherwise unavailable. There are two types of California Substitution Attorney: a pro HAC vice attorney and a special substitution attorney. A pro HAC vice attorney is a lawyer who is admitted to practice in a state other than California but is authorized to appear in a specific California court for a particular case. A special substitution attorney is a lawyer appointed by the court who is an experienced attorney in the legal field and can step in to represent a party in the case.