A Q&A guide on the different ways to respond to a subpoena issued in a California civil proceeding. This Q&A addresses the requirements for complying with a discovery subpoena, objecting to a discovery subpoena seeking documents, moving to quash a discovery subpoena, and moving for a protective order. Answers to questions can be compared across a number of jurisdictions (see Responding to Discovery Subpoenas: State Q&A Tool).