Short answer
A subpoena requires a witness to appear and testify or produce documents; a search warrant authorizes a law enforcement officer to search described premises and seize described items. The central difference is compelled participation versus authority to conduct a search—not simply whether documents are involved. 1 2
On this page
At a glance
Scroll to compare all columns →
| Attribute | Subpoena | Search warrant |
|---|---|---|
| Operative function | Requires witness testimony or document production | Authorizes search and seizure |
| Person addressed | Witness | Law enforcement officer |
| Authority described | Issued under court authority | Court order |
| Scope described | Appearance, testimony, documents | Described premises and items |
These are the functions identified in the supplied federal court glossaries. 1 2
What each thing is
The US Courts glossary distinguishes an ordinary subpoena for testimony from a subpoena duces tecum for document production. The Massachusetts federal criminal glossary uses “subpoena” more broadly to include a requirement to bring relevant documents. A search warrant instead grants an officer authority to search and seize. 1 2
Key differences
For a subpoena, the commanded act belongs to the witness: appearing, testifying, or bringing documents. For a search warrant, the authorized act belongs to the officer: searching specified premises for specified objects and seizing described items. Both involve court authority, but that shared origin does not make their functions interchangeable. 1 2
How to tell them apart
Read the operative instruction. A requirement that a witness appear, testify, or bring documents points to a subpoena; permission for an officer to search premises and seize items points to a search warrant. This is a functional identification rule, not a test of whether a particular document was validly issued. 1 2
Where they overlap
Both processes can concern documentary evidence: a subpoena may require a witness to bring documents, while the search-warrant definition covers specified objects and described items. The object sought alone therefore does not establish which process is involved; the required or authorized action matters. 2
Edge cases
“Warrant” by itself is broader than “search warrant.” The US Courts glossary includes authorization to search or make an arrest within that umbrella term. An arrest warrant is thus a bounded related concept, not another name for a subpoena or necessarily an authorization to search premises. 1
Why the distinction exists
The distinction separates securing a witness’s participation from authorizing an officer’s search. In the federal criminal context described by the Massachusetts glossary, subpoenas support trial testimony for either side: the defendant has a Sixth Amendment compulsory-process right, and the government may also subpoena witnesses. 2
Common misconceptions
A subpoena is not limited to spoken testimony: it can also require documents. Conversely, calling something a court order does not identify it as a subpoena, because the supplied glossary also describes a search warrant as a court order. Look at its function rather than that shared label. 1 2
Examples
Hypothetical case one: a witness is ordered to attend a federal trial and bring relevant records. That fits the subpoena description. Hypothetical case two: an officer receives a court order to search a described office for specified records and seize them. That fits the search-warrant description, even though both cases concern records. 2