Pennsylvania Substitution of Counsel Without Leave of Court is a procedure that allows a party in a legal action to substitute or change attorneys without having to obtain the permission of the court. This type of substitution can occur in both civil and criminal proceedings. There are two types of Pennsylvania Substitution of Counsel Without Leave of Court: voluntary substitution and involuntary substitution. Voluntary substitution occurs when an attorney and a client mutually agree to terminate the attorney-client relationship and substitute another attorney. In this case, the party must file a notice of substitution with the court and serve the opposing party. The notice must include the name, address, and contact information for the new attorney. Involuntary substitution occurs when an attorney fails to fulfill their obligations or withdraws from the case without the consent of the client. In this case, the client must file a motion with the court to obtain the substitution of counsel. The motion must include the reasons for the substitution and must be served on the opposing party. The court will then review the motion and decide whether to grant the substitution.