A subpoena is a court order telling someone to produce something, give evidence or do both. Many people receive one without ever being a party to the case. It might arrive by post, by email or in person. Knowing what it asks and what your rights are makes the process far less stressful.
This guide uses information published by Legal Aid NSW. The general ideas are similar in other states, but court rules and forms vary. Always check the rules of the court named on the document. When in doubt, get advice before the due date passes.