Illinois Order of Protection (OP) Proof of Service in Open Court is a document used to prove that an OP was served in open court. This document is signed by the court clerk and serves as proof that the court ordered the respondent to comply with the OP. It includes the date the OP was served, the name of the respondent, the name of the petitioner, the court's order, and the name of the person who served the OP. There are two types of Illinois Order of Protection Proof of Service in Open Court: Personal Service in Open Court and Substituted Service in Open Court. Personal service involves the petitioner or a third party delivering the OP to the respondent in open court. Substituted service involves delivering the OP to someone else, such as a family member or friend, who then delivers it to the respondent.