Indiana Substitution of Attorney is a legal document that allows a person to replace their attorney in a court case with another one. It is also known as a “Change of Attorney” form. The document must be filed with the court in order to be valid. There are two types of Indiana Substitution of Attorney: voluntary and mandatory. Voluntary Substitution of Attorney occurs when a party in the case agrees to replace their attorney with another one. Mandatory Substitution of Attorney occurs when one of the parties in the case has died, is removed, or is otherwise unable to serve. If the attorney is removed, a judge must approve the change.