A Q&A guide to drafting, issuing, serving, and enforcing a discovery subpoena in an Illinois civil proceeding. This Q&A addresses the state statutes and rules governing discovery subpoenas, the types of discovery subpoenas available, the requirements for drafting and serving a discovery subpoena, and the methods of enforcing a discovery subpoena. Answers to questions can be compared across a number of jurisdictions (see Drafting and Issuing Discovery Subpoenas: State Q&A Tool).