A deposition subpoena in California is a discovery tool that compels a nonparty witness to give testimony, produce documents, or both before trial. An attorney of record can issue one without a judge’s signature, but the subpoena only works if it is personally served, delivered with enough lead time, and — when personal records are involved — paired with written notice to the person whose information is being sought. Miss any of those steps and the subpoena can be quashed.
The Three Types
California recognizes three forms of deposition subpoena under Code of Civil Procedure 2020.010.1California Legislative Information. California Code of Civil Procedure CCP 2020.010 The right one depends on what you actually need from the witness.
- A subpoena for personal appearance orders the witness to show up at a specific time and place and give oral testimony.
- A business records subpoena directs a custodian of records to produce documents or electronically stored information without anyone having to appear.
- A combined subpoena requires the witness to appear, testify, and bring specified documents or items.
These rules govern nonparty discovery. Depositions of actual parties to the lawsuit run on a separate track under CCP 2025.210 through 2025.620, where a deposition notice alone compels attendance and no subpoena is needed.
Who Can Issue One
An attorney of record in a California case can sign and issue a deposition subpoena on their own authority. The attorney acts as an officer of the court, so no judge’s signature or court seal is required.2California Legislative Information. California Code of Civil Procedure CCP 1985
Self-represented litigants do not have that power. If you are handling your own case, you ask the court clerk for a subpoena. The clerk will issue it signed, sealed, and otherwise blank, and you fill in the details before serving it.
Serving the Subpoena
Personal service is mandatory. For an individual, that means hand-delivering a copy directly to the witness. For an organization, the server can hand it to any officer, director, custodian of records, or authorized agent.3California Legislative Information. California Code of Civil Procedure CCP 2020.220 Mail and email do not count.
Any adult can be the server under CCP 1987, but most litigants hire a professional process server because proof of service has to hold up if the witness later fights compliance.
How much lead time you need depends on what you are asking for:
- For oral deposition testimony, service of the deposition notice must happen at least 10 days before the deposition date.4California Legislative Information. California Code of Civil Procedure CCP 2025.270
- For a business records only subpoena, the compliance date cannot be earlier than 20 days after issuance or 15 days after service, whichever is later.5California Legislative Information. California Code of Civil Procedure CCP 2020.410
- For a subpoena seeking consumer personal records covered by CCP 1985.3, the production date must be at least 20 days after issuance.
If a single subpoena combines testimony and documents, use whichever notice period is longer.
Witness Fees
Government Code 68093 sets witness compensation at $35 per day plus $0.20 per mile, round trip, when personal attendance is required.6California Legislative Information. California Government Code 68093 Under CCP 1987, the server must offer those fees at the time of service if the witness demands them. The cleanest practice is to include a check with the service papers so there is nothing to argue about later.
Notice to the Consumer When You Subpoena Personal Records
This is where subpoenas most often fall apart. If you are seeking personal records held by a third party — a bank, hospital, insurance company, school, phone company, pharmacy, attorney, accountant, or psychotherapist, among others — CCP 1985.3 requires you to notify the person whose records you want before the custodian hands anything over.7California Legislative Information. California Code of Civil Procedure CCP 1985.3
You must serve the consumer with a copy of the subpoena, any supporting affidavit, and a statutory notice explaining their right to object. The timing is unforgiving:
- At least 10 days before the production date (plus added time if you serve by mail under CCP 1013).
- At least 5 days before the subpoena is served on the custodian of records (again with added time for mail service).
Skip the notice or miscount the days and the consumer has clean grounds to move to quash. CCP 1985.4 extends the same obligations to subpoenas directed at state and local government agencies for personal information such as employee records.8California Legislative Information. California Code of Civil Procedure CCP 1985.4
Medical Records and HIPAA
Medical records carry a federal layer on top of the state rules. Under 45 CFR 164.512, a healthcare provider cannot release protected health information in response to a subpoena unless the requesting party gives “satisfactory assurances” that either the patient received notice and had time to object, or the parties have agreed to a qualified protective order (or the requesting party has sought one).9eCFR. 45 CFR 164.512 – Uses and Disclosures for Which an Authorization or Opportunity To Agree or Object Is Not Required A qualified protective order limits use of the records to the pending litigation and requires their return or destruction when the case ends.
Geographic Reach
A California deposition subpoena only compels a witness who resides in California at the time of service. CCP 1989 is explicit: a witness is not obligated to attend unless they live within the state when served.10California Legislative Information. California Code of Civil Procedure CCP 1989 The deposition itself has to take place somewhere practical for that witness.
For out-of-state witnesses, a California subpoena has no force on its own. You use the Uniform Interstate Depositions and Discovery Act, which most states have adopted. You get a subpoena from the California court, present it to the clerk of court in the county where the witness lives, and that clerk issues a local subpoena enforceable under the home state’s rules.11American Bar Association. The UIDDA and How It Affects the Out-Of-State Subpoena Process for State Cases The local subpoena then follows the discovery rules of the state where the witness is located, not California’s.
If the case is in federal court rather than state court, Federal Rule of Civil Procedure 45 takes over. FRCP 45 limits compelled attendance to within 100 miles of where the witness resides, works, or regularly conducts business, and a court must quash a subpoena that exceeds that boundary.12Legal Information Institute. Federal Rules of Civil Procedure Rule 45 – Subpoena Federal subpoenas can be served anywhere in the country, but the compliance location is still capped at 100 miles.
If You Receive One: Objecting or Moving to Quash
CCP 1987.1 lets any party, witness, or affected consumer ask the court to quash a subpoena, modify its scope, or impose protective conditions.13California Legislative Information. California Code of Civil Procedure CCP 1987.1 The usual grounds are:
- Overbreadth, where the subpoena sweeps in far more than the case needs.
- Privacy, where the records are sensitive (medical, financial, sexual history) and the requesting party has not shown a compelling need that outweighs the privacy interest.
- Privilege, including attorney-client privilege and work product.
- Defective service, including no personal service, a missing CCP 1985.3 consumer notice, or busted timing.
Consumers whose personal records are targeted have their own path. The statutory notice served under CCP 1985.3 tells the consumer they can file a motion to quash or seek a protective order before the production date. CCP 1987.1 adds a useful point: once a consumer objects, the burden shifts to the subpoenaing party to show the records should be produced, so the consumer does not have to file a motion to force that showing.
If a Witness Ignores It
A properly served witness who simply does not show up triggers escalating remedies. The first step is a motion to compel. CCP 2025.450 governs situations where a party or a party’s officer, director, or employee fails to appear for a noticed deposition; the court can order attendance and impose monetary sanctions.14California Legislative Information. California Code of Civil Procedure CCP 2025.450 For any deponent — party or nonparty — who refuses to answer questions or hand over documents during the deposition itself, CCP 2025.480 authorizes a separate motion to compel, and the court must sanction whichever side loses unless its position was substantially justified.15Justia Law. California Code of Civil Procedure CCP 2025.480
If a witness then defies the resulting court order, the conduct can be treated as contempt. Under CCP 1218, a contempt finding carries a fine of up to $1,000, up to five days in jail, or both, and the court can order the contemnor to pay the other side’s reasonable attorney fees for the contempt proceeding.16California Legislative Information. California Code of Civil Procedure CCP 1218 Most witnesses comply once a court order is in play.