Caption
United States District Court, the district, United States of America v. the defendant, and a Case No. line.
AO 443
Warrant for the Arrest of a Witness or Material Witness in a Pending Criminal Case
- Agency
- U.S. Courts
- Revision
- Rev. 11/11
- Fillable fields
- 47
- Pages
- 2
- Official source
- U.S. Courts form page
- Checked
- October 20, 2026
AO 443: Warrant for the Arrest of a Witness or Material Witness in a Pending Criminal Case
AO 443, Warrant for the Arrest of a Witness or Material Witness in a Pending Criminal Case, is a United States District Court form from the U.S. Courts. The U.S. Courts page lists it under Law Enforcement, Grand Jury, and Prosecution Forms, effective on November 1, 2011, and the PDF prints the edition AO 443 (Rev. 11/11).
It is a warrant the court issues in a case captioned United States of America v. a defendant. Page 1 is addressed "To: Any authorized law enforcement officer," commands the arrest of a named witness, and is signed by the issuing officer. It ends with a Return the arresting officer completes. Page 2 holds the witness's personal identifiers and is marked Not for Public Disclosure. It is not a form a member of the public completes.
This page explains the form in plain words and is not legal advice. You can fill it out free in your browser on this page and download the result without an account.
What's on AO 443
Command to arrest
The name of the person to be arrested and two boxes: a person served with a subpoena who failed to appear, or a material witness for which proceedings are necessary pursuant to 18 U.S.C. § 3144.
Command to detain
"YOU ARE FURTHER COMMANDED to detain this witness until this court orders discharge from custody."
Issuance
The date, the city and state, the issuing officer's signature, and the printed name and title.
Return
The date the warrant was received, the date of the arrest, the city and state, the date, and the arresting officer's signature, printed name and title.
Page 2: Personal identifiers
Name, known aliases, last known residence and prior addresses, employment, telephone numbers, place and date of birth, Social Security number, physical description, history of violence, weapons, drug use, known associates, FBI number, a description of any auto, and the investigative agency.
How AO 443 is filled out
- 1
Caption
The district, the defendant's name and the case number are entered at the top of page 1.
- 2
Witness and reason
The name of the person to be arrested is entered, and one box is checked: failure to appear after a subpoena, or material witness under 18 U.S.C. § 3144.
- 3
Issuing officer signs
The issuing officer enters the date and the city and state, signs, and prints a name and title.
- 4
Page 2 identifiers
Page 2 lists the witness's identifiers. The form says they are provided for law-enforcement use only and therefore should not be filed in court with the executed warrant unless under seal.
- 5
Arresting officer completes the Return
After the arrest, the arresting officer fills in the dates received and arrested, the city and state, the date, and a signature, printed name and title.
Why fill Form AO 443 on indox
You get the real form, filled in a browser tab, with nothing standing between you and the finished PDF.
- Fill the form right in your browser, no software to install
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- The official blank straight from the U.S. Courts, not a copy someone retyped
- Works on a phone, tablet or computer
Court, privacy and formats
Court
The warrant is captioned for a United States District Court, with the district named at the top, in a case titled United States of America v. a defendant.
Page 2 privacy note
Page 2 says it "contains personal identifiers provided for law-enforcement use only and therefore should not be filed in court with the executed warrant unless under seal," and is marked (Not for Public Disclosure).
Fees and time limits
The form does not print a fee or a time limit.
Formats
The U.S. Courts page offers AO 443 as a PDF (258.34 KB). The PDF has Print, Save As and Reset buttons.
Related forms
AO 444
Warrant for the Arrest of a Witness in a Grand Jury Proceeding (Under Seal)
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AO 445
Warrant for the Arrest of a Witness in a Civil Case
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AO 442
Arrest Warrant
50 fields, 2 pages
AO 89
Subpoena to Testify at a Hearing or Trial in a Criminal Case
35 fields, 2 pages
AO 90
Subpoena to Testify at a Deposition in a Criminal Case
33 fields, 2 pages
AO 99
Appearance Bond of Witness
30 fields, 2 pages
Who uses AO 443?
The form is signed by an issuing officer and completed in its Return by the officer who makes the arrest.
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Questions about Form AO 443
Who issues AO 443?
The court. Page 1 is signed by the issuing officer with a printed name and title, and is addressed to any authorized law enforcement officer. It is not a form a member of the public completes.
What two situations does AO 443 list?
A person who has been served with a subpoena to appear in the case and has failed to do so, and a person who is a material witness for which proceedings are necessary pursuant to 18 U.S.C. § 3144. One box is checked.
What does the warrant say happens after the arrest?
It commands the officer to bring the person before the court and to detain the witness until the court orders discharge from custody. The arresting officer then completes the Return.
Why is page 2 marked Not for Public Disclosure?
The form says page 2 contains personal identifiers provided for law-enforcement use only and therefore should not be filed in court with the executed warrant unless under seal.
Is this page legal advice?
No. This page explains the form in plain words and is not legal advice. It does not say whether a person is a material witness or whether a warrant is valid.