# What Is a Search Warrant for User Data? | Kodex Source: https://www.kodexglobal.com/glossary/search-warrant > A search warrant is a judge-issued order requiring probable cause. Learn what data it reaches, how it differs from a subpoena, and how to validate one. Legal Process ## Search Warrant A search warrant is an order issued by a judge authorising a search or seizure, granted only on a showing of probable cause. In data request work it is the instrument required to compel the contents of communications, and it is the highest legal threshold a company is likely to encounter. Also known as warrant, Rule 41 warrant A search warrant is the instrument that carries the most legal weight and, correspondingly, the most procedural protection. When one arrives, the question is rarely whether to comply. It is whether the warrant is valid and what its scope actually covers. ### What a search warrant requires Four elements have to be present: - Probable cause, supported by a sworn affidavit. - A neutral magistrate or judge who reviews that affidavit and decides independently whether the standard is met. - Particularity: the warrant must describe specifically the place to be searched and the items to be seized. - Proper issuance and service by an authority with jurisdiction over the recipient. The neutral-judge requirement is the structural protection. Unlike a subpoena, a warrant is not something an investigator can issue for themselves. ### What data a warrant reaches Under the Stored Communications Act, a warrant is the instrument required to compel the contents of communications: message bodies, stored files, photos, drafts. Everything a subpoena or a § 2703(d) order can reach, a warrant can also reach. Search warrant2703(d) order Legal standard Probable cause Specific and articulable facts Who decides Judge or magistrate Judge or magistrate Reaches content Yes No Reaches transactional records Yes Yes Relative frequency Lower Higher ### What it means for a company receiving one Compliance is mandatory, but three review steps still matter and are frequently skipped under time pressure. - Check jurisdiction. A warrant issued by a court without authority over your company is not automatically enforceable against you. Cross-border warrants raise this squarely, and the CLOUD Act framework governs much of that terrain. - Read the scope narrowly and produce to it. Particularity is a legal requirement, and producing beyond the described scope is a disclosure your users did not have to bear. If the described scope is genuinely ambiguous, the right move is to ask the issuing agency to clarify in writing, not to guess generously. - Check for an accompanying non-disclosure order. Whether you may notify the user is a separate legal question from whether you must produce, governed by a separate instrument. ### How to validate a warrant Warrants are forged less often than emergency requests, precisely because they leave a verifiable trail, but forgeries do occur, and the trail is what catches them. A warrant names an issuing court, a judge, and a case number, all of which can be checked against the court directly. The signature and the docket are the artefacts a fraudulent request cannot easily reproduce, and confirming them with the issuing court is the definitive check. FAQ ### Frequently asked questions What is probable cause? Probable cause is a reasonable basis, supported by facts, for believing that a crime has been committed and that evidence of it will be found in the place to be searched. It is a meaningfully higher bar than the relevance standard that supports a subpoena, and a neutral judge rather than the investigator decides whether it is met. Does a warrant let law enforcement take anything they ask for? No. A warrant must particularly describe the place to be searched and the things to be seized. A warrant authorising seizure of communications over a defined period does not authorise the entire account history, and a recipient is entitled to produce only what falls inside the described scope. Can a company tell the user their data was seized under a warrant? It depends on whether a separate non-disclosure order accompanies the warrant. A warrant alone does not automatically prohibit notice, but in practice one is frequently paired with a court order under 18 U.S.C. § 2705(b) that does. Absent such an order, many providers notify as a matter of policy. Glossary ### Related terms #### Subpoena A subpoena is a legal order compelling a person or company to produce documents or testimony. In data request work it is the lowest-threshold instrument: it does not require a judge’s prior approval and generally reaches basic subscriber information rather than the contents of communications. #### 2703(d) Order A 2703(d) order is a court order compelling a provider to disclose transactional records about an account. It requires specific and articulable facts showing the records are relevant to an investigation, which sits above a subpoena’s relevance standard but below a warrant’s probable cause. #### Court Order A court order is any directive issued by a judge that compels a party to act. In data request work the term usually refers to an order compelling disclosure of records, but it also covers non-disclosure orders and preservation directives, so the label alone does not tell you what an order requires. #### Stored Communications Act (SCA) The Stored Communications Act governs when US providers may disclose stored communications and account records to the government and to private parties. It sorts data into tiers and assigns a different legal instrument to each, and it is the statute that decides what a subpoena, an order, or a warrant can reach. Warrants demand careful scope review. See how Kodex structures request review and production. Learn more