A summons is a general order to appear, often to answer a claim or charge yourself. A subpoena specifically compels someone to give evidence or produce documents, usually as a witness rather than the accused. Think of a summons as "come and answer", and a subpoena as "come and testify (or hand it over)".
The core difference
A summons calls a person to appear or respond in a case, while a subpoena compels a witness to testify or produce evidence.
- subpoena — a legal order requiring someone to appear in court or produce evidence, under threat of punishment: Prosecutors subpoenaed the company's financial records.
- summons — a formal order to appear somewhere, especially in court: He received a summons to appear before the magistrate.
How to tell them apart
A useful memory hook is the word's own shape: subpoena comes from the Latin sub poena, meaning "under penalty" — it is the threat of punishment built into the word. A summons, by contrast, simply "summons" or calls someone forward, without that built-in penalty in its name.
In everyday use, people often meet a summons as a defendant or as jury duty — a jury summons is a common example. A subpoena is more often served on a witness or a business, ordering them to testify or to produce records, even if they are not a party to the case themselves.
