Justice Stevens
delivered the opinion of the Court.
The two questions presented concern the scope of a witness’ protection against compelled self-incrimination: (1) whether the Fifth Amendment privilege1 protects a [30]*30witness from being compelled to disclose the existence of incriminating documents that the Government is unatile to describe with reasonable particularity; and (2) if the witness produces such documents pursuant to a grant of immunity, whether 18 U. S. C. § 6002 prevents the Government from using them to prepare criminal charges against him.2
I
This proceeding arises out of the second prosecution of respondent, Webster Hubbell, commenced by the Independent Counsel appointed in August 1994 to investigate possible violations of federal law relating to the Whitewater Development Corporation. The first prosecution was terminated pursuant to a plea bargain. In December 1994, respondent pleaded guilty to charges of máil fraud and tax evasion arising out of his billing practices as a member of an Arkansas law firm from 1989 to 1992, and was sentenced to 21 months in prison. In the plea agreement, respondent promised to provide the Independent Counsel with “full, complete, accurate, and truthful information” about matters relating to the Whitewater investigation.
The second prosecution resulted from the Independent Counsel’s attempt to determine whether respondent had vio[31]*31lated that promise. In October 1996, while respondent was incarcerated, the Independent Counsel served him with a subpoena duces tecum calling for the production of 11 categories of documents before a grand jury sitting in Little Rock, Arkansas. See Appendix, infra. On November 19, he appeared before the grand jury and invoked his Fifth Amendment privilege against self-incrimination. In response to questioning by the prosecutor, respondent initially refused “to state whether there are documents within my possession, custody, or control responsive to the Subpoena.” App. 62. Thereafter, the prosecutor produced an order, which had previously been obtained from the District Court pursuant to 18 U. S. C. § 6003(a),3 directing him to respond to the subpoena and granting him immunity “to the extent allowed by law.”4 Respondent then produced 13,120 pages of documents and records and responded to a series of questions that established that those were all of the documents in his custody or control that were responsive to the commands in the subpoena, with the exception of a few documents he claimed were shielded by the attorney-client and attorney work-product privileges.
The contents of the documents produced by respondent provided the Independent Counsel with the information that led to this second prosecution. On April 30, 1998, a grand jury in the District of Columbia returned a 10-eount indictment charging respondent with various tax-related crimes and mail and wire fraud.5 The District Court dismissed the [32]*32indictment relying, in part, on the ground that the Independent Counsel’s use of the subpoenaed documents violated § 6002 because all of the evidence he would offer against respondent at trial derived either directly or indirectly from the testimonial aspects of respondent’s immunized act of producing those documents.6 11 F. Supp. 2d 25, 33-37 (DC 1998). Noting that the Independent Counsel had admitted that he was not investigating tax-related issues when he issued the subpoena, and that he had “ 'learned about the unreported income and other crimes from studying the records’ contents,’ ” the District Court characterized the subpoena as “the quintessential fishing expedition.” Id., at 37.
The Court of Appeals vacated the judgment and remanded for further proceedings. 167 F. 3d 552 (CADC 1999). The majority concluded that the District Court had incorrectly relied on the fact that the Independent Counsel did not have prior knowledge of the contents of the subpoenaed documents. The question the District Court should have addressed was the extent of the Government’s independent knowledge of the documents’ existence and authenticity, and of respondent’s possession or control of them. It explained:
“On remand, the district court should hold a hearing in which it seeks to establish the extent and detail of the [Gjovernment’s knowledge of Hubbell’s financial affairs (or of the paperwork documenting it) on the day the subpoena issued. It is only then that the court will be in a position to assess the testimonial value of Hubbell’s response to the subpoena. Should the Independent Counsel prove capable of demonstrating with reasonable [33]*33particularity a prior awareness that the exhaustive litany of documents sought in the subpoena existed and were in Hubbell’s possession, then the wide distance evidently traveled from the subpoena to the substantive allegations contained in the indictment would be based upon legitimate intermediate steps. To the extent that the information conveyed through Hubbell’s compelled act of production provides the necessary linkage, however, the indictment deriving therefrom is tainted.” Id., at 581.
In the opinion of the dissenting judge, the majority failed to give full effect to the distinction between the contents of the documents and the limited testimonial significance of the act of producing them. In his view, as long as the prosecutor could make use of information contained in the documents or derived therefrom without any reference to the fact that respondent had produced them in response to a subpoena, there would be no improper use of the testimonial aspect of the immunized act of production. In other words, the constitutional privilege and the statute conferring use immunity would only shield the witness from the use of any information resulting from his subpoena response “beyond what the prosecutor would receive if the documents appeared in the grand jury room or in his office unsolicited and unmarked, like manna from heaven.”7 Id., at 602.
On remand, the Independent Counsel acknowledged that he could not satisfy the “reasonable particularity” standard prescribed by the Court of Appeals and entered into a conditional plea agreement with respondent. In essence, the agreement provides for the dismissal of the charges unless this Court’s disposition of the case makes it reasonably likely that respondent’s “act [of] production immunity” would not [34]*34pose a significant bar to his prosecution. App. 106-107. The ease is not moot, however, because the agreement also provides for the entry of a guilty plea and a sentence that will not include incarceration if we should reverse and issue an opinion that is sufficiently favorable to the Government to satisfy that condition. Ibid. Despite that agreement, we granted the Independent Counsel’s petition for a writ of cer-tiorari in order to determine the precise scope of a grant of immunity with respect to the production of documents in response to a subpoena. 528 U. S. 926 (1999). We now affirm.
II
It is useful to preface our analysis of the constitutional issue with a restatement of certain propositions that are not in dispute. The term “privilege against self-incrimination” is not an entirely accurate description of a person’s constitutional protection against being “compelled in any criminal case to be a witness against himself.”
The word “witness” in the constitutional text limits the relevant category of compelled incriminating communications to those that are “testimonial” in character.8 As Justice Holmes observed, there is a significant difference between the use of compulsion to extort communications from a defendant and compelling a person to engage in conduct [35]*35that may be incriminating.9 Thus, even though the act may provide incriminating evidence, a criminal suspect may be compelled to put on a shirt,10 to provide a blood sample11 or handwriting exemplar,12 or to make a recording of his voice.13 The act of exhibiting such physical characteristics is not the same as a sworn communication by a witness that relates either express or implied assertions of fact or belief. Pennsylvania v. Muniz, 496 U. S. 582, 594-598 (1990). Similarly, the fact that incriminating evidence may be the byproduct of obedience to a regulatory requirement, such as filing an income tax return,14 maintaining required records,15 or reporting an accident,16 does not clothe such required conduct with the testimonial privilege.17
More relevant to this case is the settled proposition that a person may be required to produce specific documents even though they contain incriminating assertions of fact or belief because the creation of those documents was not “compelled” [36]*36within the meaning of the privilege. Our decision in Fisher v. United States, 425 U. S. 391 (1976), dealt with summonses issued by the Internal Revenue Service (IRS) seeking working papers used in the preparation of tax returns. Because the papers had been voluntarily prepared prior to the issuance of the summonses, they could not be “said to contain compelled testimonial evidence, either of the taxpayers or of anyone else.” Accordingly, the taxpayer could not “avoid compliance with the subpoena merely by asserting that the item of evidence which he is required to produce contains incriminating writing, whether his own or that of someone else.” Id., at 409-410; see also United States v. Doe, 465 U. S. 605 (1984).18 It is clear, therefore, that respondent Hubbell could not avoid compliance with the subpoena served on him merely because the demanded documents contained incriminating evidence, whether written by others or voluntarily prepared by himself.
On the other hand, we have also made it clear that the act of producing documents in response to a subpoena may have a compelled testimonial aspect. We have held that “the act of production” itself may implicitly communicate “statements of fact.” By “producing documents in compliance with a subpoena, the witness would admit that the papers existed, were in his possession or control, and were authentic.”19 [37]*37Moreover, as was true in this ease, when the custodian of documents responds to a subpoena, he may be compelled to take the witness stand and answer questions designed to determine whether he has produced everything demanded by the subpoena.20 The answers to those questions, as well as the act of production itself, may certainly communicate information about the existence, custody, and authenticity of the documents. Whether the constitutional privilege protects the answers to such questions, or protects the act of production itself, is a question that is distinct from the question whether the unprotected contents of the documents themselves are incriminating.
Finally, the phrase “in any criminal ease” in the text of the Fifth Amendment might have been read to limit its coverage to compelled testimony that is used against the defendant in the trial itself. It has, however, long been settled that its protection encompasses compelled statements that lead to the discovery of incriminating evidence even though the statements themselves are not incriminating and are not introduced into evidence. Thus, a half century ago we held [38]*38that a trial judge had erroneously rejected a defendant’s claim of privilege on the ground that his answer to the pending question would not itself constitute evidence of the charged offense. As we explained:
“The privilege afforded not only extends to answers that would in themselves support a conviction under a federal criminal statute but likewise embraces those which would furnish a link in the chain of evidence needed to prosecute the claimant for a federal crime.” Hoffman v. United States, 341 U. S. 479, 486 (1951).
Compelled testimony that communicates information that may “lead to incriminating evidence” is privileged even if the information itself is not inculpatory. Doe v. United States, 487 U. S. 201, 208, n. 6 (1988). It is the Fifth Amendment’s protection against the prosecutor’s use of incriminating information derived directly or indirectly from the compelled testimony of the respondent that is of primary relevance in this case.
Ill
Acting pursuant to 18 U. S. C. §6002, the District Court entered an order compelling respondent to produce “any and all documents” described in the grand jury subpoena and granting him “immunity to the extent allowed by law.” App. 60-61. In Kastigar v. United States, 406 U. S. 441 (1972), we upheld the constitutionality of §6002 because the scope of the “use and derivative-use” immunity that it provides is coextensive with the scope of the constitutional privilege against self-incrimination.
The protection against the derivative use of compelled testimony distinguishes § 6002 from the 1868 statute that had been held invalid in Counselman v. Hitchcock, 142 U. S. 547 (1892), because it merely provided “use” immunity, as well as from the more recent federal statutes that broadly provide “transactional” immunity. In Kastigar the petitioners argued that, under our reasoning in Counselman, nothing less [39]*39than full transactional immunity from prosecution for any offense to which compelled testimony relates could suffice to supplant the privilege. In rejecting that argument, we stressed the importance of §6002’s “explicit proscription” of the use in any criminal case of “ ‘testimony or other information compelled under the order (or any information directly or indirectly derived from such testimony or other information).’ ” 406 U. S., at 453. We particularly emphasized the critical importance of protection against a fixture prosecution “ ‘based on knowledge and sources of information obtained from the compelled testimony.’” Id., at 454 (quoting Ullmamt v. United States, 350 U. S. 422, 437 (1956)).21
We also rejected the petitioners’ argument that derivative-use immunity under §6002 would not obviate the risk that the prosecutor or other law enforcement officials may use compelled testimony to obtain leads, names of witnesses, or other information not otherwise available to support a prosecution. That argument was predicated on the incorrect assumption that the derivative-use prohibition would prove impossible to enforce. But given that the statute contains a “comprehensive safeguard” in the form of a “sweeping proscription of any use, direct or indirect, of the [40]*40compelled testimony and any information derived therefrom,” we concluded that a person who is prosecuted for matters related to testimony he gave under a grant of immunity does not have the burden of proving that his testimony was improperly used. Instead, we held that the statute imposes an affirmative duty on the prosecution, not merely to show that its evidence is not tainted by the prior testimony, but “to prove that the evidence it proposes to use is derived from a legitimate source wholly independent of the compelled testimony.” Id., at 460.22 Requiring the prosecution to shoulder this burden ensures that the grant of immunity has “le[ft] the witness and the Federal Government in substantially the same position as if the witness had claimed his privilege in the absence of a grant of immunity.” 'Id., at 458-459 (internal quotation marks and footnote omitted).
The “compelled testimony” that is relevant in this ease is not to be found in the contents of the documents produced in response to the subpoena. It is, rather, the testimony inherent in the act of producing those documents. The disagreement between the parties focuses entirely on the significance of that testimonial aspect.
IV
The Government correctly emphasizes that the testimonial aspect of a response to a subpoena duces tecum does nothing [41]*41more than establish the existence, authenticity, and custody of items that are produced. We assume that the Government is also entirely correct in its submission that it would not have to advert to respondent’s act of production in order to prove the existence, authenticity, or custody of any documents that it might offer in evidence at a criminal trial; indeed, the Government disclaims any need to introduce any of the documents produced by respondent into evidence in order to prove the charges against him. It follows, according to the Government, that it has no intention of making improper “use” of respondent’s compelled testimony.
The question, however, is not whether the response to the subpoena may be introduced into evidence at his criminal trial. That would surely be a prohibited “use” of the immunized act of production. See In re Sealed Case, 791 F. 2d 179, 182 (CADC 1986) (Sealia, J.). But the fact that the Government intends no such use of the act of production leaves open the separate question whether it has already made “derivative use” of the testimonial aspect of that act in obtaining the indictment against respondent and in preparing its ease for trial. It clearly has.
It is apparent from the text of the subpoena itself that the prosecutor needed respondent’s assistance both to identify potential sources of information and to produce those sources. See Appendix, infra. Given the breadth of the description of the 11 categories of documents called for by the subpoena, the collection and production of the materials demanded was tantamount to answering a series of interrogatories asking a witness to disclose the existence and location of particular documents fitting certain broad descriptions. The assembly of literally hundreds of pages of material in response to a request for “any and all documents reflecting, referring, or relating to any direct or indirect sources of money or other things of value received by or provided to” an individual or members of his family during a 8-year period, Appendix, infra, at 46-49, is the functional equivalent of the preparation of an answer to either a detailed written [42]*42interrogatory or a series of oral questions at a discovery deposition. Entirely apart from the contents of the 13,120 pages of materials that respondent produced in this case, it is undeniable that providing a catalog of existing documents fitting within any of the 11 broadly worded subpoena categories could provide a prosecutor with a “lead to incriminating evidence,” or “a link in the chain of evidence needed to prosecute.”
Indeed, the record makes it clear that that is what happened in this case. The documents were produced before a grand jury sitting in the Eastern District of Arkansas in aid of the Independent Counsers attempt to determine whether respondent had violated a commitment in his first plea agreement. The use of those sources of information eventually led to the return of an indictment by a grand jury sitting in the District of Columbia for offenses that apparently are unrelated to that plea agreement. What the District Court characterized as a “fishing expedition” did produce a fish, but not the one that the Independent Counsel expected to hook. It is abundantly clear that the testimonial aspect of respondent’s act of producing subpoenaed documents was the first step in a chain of evidence that led to this prosecution. The documents did not magically appear in the prosecutor’s office like “manna from heaven.” They arrived there only after respondent asserted his constitutional privilege, received a grant of immunity, and — under the compulsion of the District Court’s order — took the mental and physical steps necessary to provide the prosecutor with an accurate inventory of the many sources of potentially incriminating evidence sought by the subpoena. It was only through respondent’s truthful reply to the subpoena23 that the Government re[43]*43ceived the incriminating documents of which it made "substantial use ... in the investigation that led to the indictment.” Brief for United States 3.
For these reasons, we cannot accept the Government’s submission that respondent’s immunity did not preclude its derivative use of the produced documents because its “possession of the documents [was] the fruit only of a simple physical act — the act of producing the documents.” Id., at 29. It was unquestionably necessary for respondent to make extensive use of “the contents of his own mind” in identifying the hundreds of documents responsive to the requests in the subpoena. See Curcio v. United States, 354 U. S. 118, 128 (1957); Doe v. United States, 487 U. S., at 210. The assembly of those documents was like telling an inquisitor the combination to a wall safe, not like being forced to surrender the key to a strongbox. Id., at 210, n. 9. The Government’s anemic view of respondent’s act of production as a mere physical act that is principally nontestimonial in character and can be entirely divorced from its “implicit” testimonial aspect so as to constitute a “legitimate, wholly independent source” (as required by Kastigar) for the documents produced simply fails to account for these realities.
In sum, we have no doubt that the constitutional privilege against self-incrimination protects the target of a grand jury investigation from being compelled to answer questions designed to elicit information about the existence of sources of potentially incriminating evidence. That constitutional privilege has the same application to the testimonial aspect of a response to a subpoena seeking discovery of those sources. Before the District Court, the Government arguably conceded that respondent’s act of production in this case had a testimonial aspect that entitled him to respond to the subpoena by asserting his privilege against self-incrimination. See 167 F. 3d, at 580 (noting District [44]*44Court’s finding that “Hubbell’s compelled act of production required him to make communications as to the existence, possession, and authenticity of the subpoenaed documents”). On appeal and again before this Court, however, the Government has argued that the communicative aspect of respondent’s act of producing ordinary business records is insufficiently “testimonial” to support a claim of privilege because the existence and possession of such records by any businessman is a “foregone conclusion” under our decision in Fisher v. United States, 425 U. S., at 411. This argument both misreads Fisher and ignores our subsequent decision in United States v. Doe, 465 U. S. 605 (1984).
As noted in Part II, supra, Fisher involved summonses seeking production of working papers prepared by the taxpayers’ accountants that the IRS knew were in the possession of the taxpayers’ attorneys. 425 U. S., at 394. In rejecting the taxpayers’ claim that these documents were protected by the Fifth Amendment privilege, we stated:
“It is doubtful that implicitly admitting the existence and possession of the papers rises to the level of testimony within the protection of the Fifth Amendment. The papers belong to the accountant, were prepared by him, and are the kind usually prepared by an accountant working on the tax returns of his client. Surely the Government is in no way relying on the ‘truthtelling’ of the taxpayer to prove the existence of or his access to the documents.... The existence and location of the papers are a foregone conclusion and the taxpayer adds little or nothing to the sum total of the Government’s information by conceding that he in fact has the papers.” Id., at 411 (emphases added).
Whatever the scope of this “foregone conclusion” rationale, the facts of this case plainly fall outside of it. While in Fisher the Government already knew that the documents were in the attorneys’ possession and could independently [45]*45confirm their existence and authenticity through the accountants who created them, here the Government has not shown that it had any prior knowledge of either the existence or the whereabouts of the 13,120 pages of documents ultimately produced by respondent. The Government cannot cure this deficiency through the overbroad argument that a businessman such as respondent will always possess general business and tax records that fall within the broad categories described in this subpoena. The Doe subpoenas also sought several broad categories of general business records, yet we upheld the District Court’s finding that the act of producing those records would involve testimonial self-incrimination. 465 U. S., at 612-614, and n. 13.
Given our conclusion that respondent’s act of production had a testimonial aspect, at least with respect to the existence and location of the documents sought by the Government’s subpoena, respondent could not be compelled to produce those documents without first receiving a grant of immunity under § 6003. As we construed § 6002 in Kastigar, such immunity is coextensive with the constitutional privilege. Kastigar requires that respondent’s motion to dismiss the indictment on immunity grounds be granted unless the Government proves that the evidence it used in obtaining the indictment and proposed to use at trial was derived from legitimate sources “wholly independent” of the testimonial aspect of respondent’s immunized conduct in assembling and producing the documents described in the subpoena. The Government, however, does not claim that it could make such a showing. Rather, it contends that its prosecution of respondent must be considered proper unless someone — presumably respondent — shows that “there is some substantial relation between the compelled testimonial communications implicit in the act of production (as opposed to the act of production standing alone) and some aspect of the information used in the investigation or the evidence presented at trial.” Brief for United States 9. We could not accept [46]*46this submission without repudiating the basis for our conclusion in Kastigar that the statutory guarantee of use and derivative-use immunity is as broad as the constitutional privilege itself. This we are not prepared to do.
Accordingly, the indictment against respondent must be dismissed. The judgment of the Court of Appeals is affirmed.
It is so ordered.
APPENDIX TO OPINION OF THE COURT
On October 31, 1996, upon application by the Independent Counsel, a subpoena was issued commanding respondent to appear and testify before the grand jury of the United States District Court for the Eastern District of Arkansas on November 19, 1996, and to bring with him various documents described in a “Subpoena Rider” as follows:
“A. Any and all documents reflecting, referring, or relating to any direct or indirect sources of money or other things of value received by or provided to Webster Hubbell, his wife, or children from January 1, 1993 to the present, including but not limited to the identity of employers or clients of legal or any other type of work.
“B. Any and all documents reflecting, referring, or relating to any direct or indirect sources of money of other things of value received by or provided to Webster Hubbell, his wife, or children from January 1, 1993 to the present, including but not limited to billing memoranda, draft statements, bills, final statements, and/or bills for work performed or time billed from January 1, 1993 to the present.
“C. Copies of all bank records of Webster Hubbell, his wife, or children for all accounts from January 1,1993 to the present, including but not limited to all statements, registers and ledgers, cancelled cheeks, deposit items, and wire transfers.
“D. Any and all documents reflecting, referring, or relating to time worked or billed by Webster Hubbell from [47]*47January 1, 1993 to the present, including but not limited to original time sheets, books, notes, papers, and/or computer records.
“E. Any and all documents reflecting, referring, or relating to expenses incurred by and/or disbursements of money by Webster Hubbell during the course of any work performed or to be performed by Mr. Hubbell from January 1,1993 to the present.
“F. Any and all documents reflecting, referring, or relating to Webster Hubbell’s schedule of activities, including but not limited to any and all calendars, day-timers, time books, appointment books, diaries, records of reverse telephone toll calls, credit card calls, telephone message slips, logs, other telephone records, minutes, databases, electronic mail messages, travel records, itineraries, tickets for transportation of any kind, payments, bills, expense backup documentation, schedules, and/or any other document or database that would disclose Webster Hubbell’s activities from January 1,1993 to the present.
“G. Any and all documents reflecting, referring, or relating to any retainer agreements or contracts for employment of Webster Hubbell, his wife, or his children from January 1,1993 to the present.
“H. Any and all tax returns and tax return information, including but not limited to all W-2s, form 1099s, schedules, draft returns, work papers, and backup documents filed, created or held by or on behalf of Webster Hubbell, his wife, his children, and/or any business in which he, his wife, or his children holds or has held an interest, for the tax years 1993 to the present.
“I. Any and all documents reflecting, referring, or relating to work performed or to be performed or on behalf of the City of Los Angeles, California, the Los Angeles Department of Airports or any other Los Angeles municipal Governmental entity, Mary Leslie, and/or Alan S. Arkatov, including but not limited to correspondence, retainer agree[48]*48ments, contracts, time sheets, appointment calendars, activity calendars, diaries, billing statements, billing memo-randa, telephone records, telephone message slips, telephone credit card statements, itineraries, tickets for transportation, payment records, expense receipts, ledgers, check registers, notes, memoranda, electronic mail, bank deposit items, cashier’s cheeks, traveler’s checks, wire transfer records and/or other records of financial transactions.
“J. Any and all documents reflecting, referring, or relating to work performed or to be performed by Webster Hubbell, his wife, or his children on the recommendation, counsel or other influence of Mary Leslie and/or Alan S. Arkatov, including but not limited to correspondence, retainer agreements, contracts, time sheets, appointment calendars, activity calendars, diaries, billing statements, billing memoranda, telephone records, telephone message slips, telephone credit card statements, itineraries, tickets for transportation, payment records, expense receipts, ledgers, check registers, notes, memoranda, electronic mail, bank deposit items, cashier’s checks, traveler’s checks, wire transfer records and/or other records of financial transactions.
“K. Any and all documents related to work performed or to be performed for or on behalf of Lippo Ltd. (formerly Public Finance (H. K.) Ltd.), the Lippo Group, the Lippo Bank, Mochtar Riady, James Riady, Stephen Riady, John Luen Wai Lee, John Huang, Mark W. Grobmyer, C. Joseph Giroir, Jr., or any affiliate, subsidiary, or corporation owned or controlled by or related to the aforementioned entities or individuals, including but not limited to correspondence, retainer agreements, contracts, time sheets, appointment calendars, activity calendars, diaries, billing statements, billing memoranda, telephone records, telephone message slips, telephone credit card statements, itineraries, tickets for transportation, payment records, expense receipts, ledgers, check registers, notes, memoranda, electronic mail, bank [49]*49deposit items, cashier’s checks, traveler’s checks, wire transfer records and/or other records of financial transactions.” App. 47-49.
CHIEF Justice Rehnquist dissents and would reverse the judgment of the Court of Appeals in part, for the reasons given by Judge Williams in his dissenting opinion in that court, 167 F. 3d 552, 597 (CADC 1999).