Mr. Justice Powell
delivered the opinion of the Court.
The question is whether the District Court properly suppressed the fruits of an unlawful search that did not invade the respondent’s Fourth Amendment rights.
I
Respondent Jack Payner was indicted in September 1976 on a charge of falsifying his 1972 federal income tax return in violation of 18 U. S. C. § 1001.1 The indictment alleged that respondent denied maintaining a foreign bank account at a time when he knew that he had such an account at the Castle Bank and Trust Company of Nassau, Bahama Islands. The Government’s case rested heavily on a loan guarantee agreement dated April 28, 1972, in which respondent pledged [729]*729the funds in his Castle Bank account as security for a $100,000 loan.
Respondent waived his right to jury trial and moved to suppress the guarantee agreement. With the consent of the parties, the United States District Court for the • Northern District of Ohio took evidence on the motion at a hearing consolidated with the trial on the merits. The court found respondent guilty as charged on the basis of all the evidence. The court also found, however, that the Government discovered the guarantee agreement by exploiting a flagrantly illegal search that occurred on January 15, 1973. The court therefore suppressed “all evidence introduced in the case by the Government with the exception of Jack Payner’s 1972 tax return . . . and the related testimony.” 434 F. Supp. 113, 136 (1977). As the tax return alone was insufficient to demonstrate knowing falsification, the District Court set aside respondent’s conviction.2
The events leading up to the 1973 search are not in dispute. In 1965, the Internal Revenue Service launched an investigation into the financial activities of American citizens in the Bahamas. The project, known as “Operation Trade Winds,” was headquartered in Jacksonville, Fla. Suspicion focused on the Castle Bank in 1972, when investigators learned that a suspected narcotics trafficker had an account there. Special Agent Richard Jaffe of the Jacksonville office asked Norman Casper, a private investigator and occasional informant, to learn what he could about the Castle Bank and its depositors. To that end, Casper cultivated his friendship with Castle [730]*730Bank vice president Michael Wolstencroft. Casper introduced Wolstencroft to Sybol Kennedy, a private investigator and former employee. When Casper discovered that the banker intended to spend a few days in Miami in January 1973, he devised a scheme to gain access to the bank records he knew Wolstencroft would be carrying in his briefcase. Agent Jaffe approved the basic outline of the plan.
Wolstencroft arrived in Miami on January 15 and went directly to Kennedy’s apartment. At about 7:30 p. m., the two left for dinner at a Key Biscayne restaurant. Shortly thereafter, Casper entered the apartment using a key supplied by Kennedy. He removed the briefcase and delivered it to Jaffe.' While the agent supervised the copying of approximately 400 documents taken from the briefcase, a “lookout” observed Kennedy and Wolstencroft at dinner. The observer notified Casper when the pair left the restaurant, and the briefcase was replaced. The documents photographed that evening included papers evidencing a close working relationship between the Castle Bank and the Bank of Perrine, Fla. Subpoenas issued to the Bank of Perrine ultimately uncovered the loan guarantee agreement at issue in this case.
The District Court found that the United States, acting through Jaffe, “knowingly and willfully participated in the unlawful seizure of Michael Wolstencroft’s briefcase....” Id., at 120. According to that court, “the Government affirmatively counsels its agents that the Fourth Amendment standing limitation permits them to purposefully conduct an unconstitutional search and seizure of one individual in order to obtain evidence against third parties. . . .” Id., at 132-133. The District Court also found that the documents seized from Wolstencroft provided the leads that ultimately led to the discovery of the critical loan guarantee agreement. Id., at 123.3 Although the search did not impinge upon the [731]*731respondent's Fourth Amendment rights, the District Court believed that the Due Process Clause of the Fifth Amendment and the inherent supervisory power of the federal courts required it to exclude evidence tainted by the Government’s “knowing and purposeful bad faith hostility to any person’s fundamental constitutional rights.” Id., at 129; see id., at 133, 134-135.
The Court of Appeals for the Sixth Circuit affirmed in a brief order endorsing the District Court’s use of its supervisory power. 590 F. 2d 206 (1979) (per curiam). The Court of Appeals did not decide the due process question. We granted certiorari, 444 U. S. 822 (1979), and we now reverse.
II
This Court discussed the doctrine of “standing to invoke the [Fourth Amendment] exclusionary rule” in some detail last Term. Rakas v. Illinois, 439 U. S. 128, 138 (1978). We reaffirmed the established rule that a court may not exclude evidence under the Fourth Amendment unless it finds that an unlawful search or seizure violated the defendant’s own constitutional rights. Id., at 133-140. See, e. g., Brown v. United States, 411 U. S. 223, 229-230 (1973); Alderman v. United States, 394 U. S. 165, 171-172 (1969); Simmons v. United States, 390 U. S. 377, 389 (1968). And the defendant’s Fourth Amendment rights are violated only when the challenged conduct invaded his legitimate expectation of privacy rather than that of a third party. Rakas v. Illinois, 439 U. S., at 143; id., at 149-152 (Powell, J., concurring) ; Combs v. United States, 408 U. S. 224, 227 (1972); Mancusi v. DeForte, 392 U. S. 364, 368 (1968).
The foregoing authorities establish, as the District Court recognized, that respondent lacks standing under the Fourth [732]*732Amendment to suppress the documents illegally seized from Wolstencroft. 434 F. Supp., at 126. The Court of Appeals did not disturb the District Court’s conclusion that “Jack Payner possessed no privacy interest in the Castle Bank documents that were seized from Wolstencroft.” Ibid.; see 590 F. 2d, at 207. Nor do we. United States v. Miller, 425 U. S. 435 (1976), established that a depositor has no expectation of privacy and thus no “protectable Fourth Amendment interest” in copies of checks and deposit slips retained by his bank. Id., at 437; see id., at 442. Nothing in the record supports a contrary conclusion in this case.4
[733]
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Mr. Justice Powell
delivered the opinion of the Court.
The question is whether the District Court properly suppressed the fruits of an unlawful search that did not invade the respondent’s Fourth Amendment rights.
I
Respondent Jack Payner was indicted in September 1976 on a charge of falsifying his 1972 federal income tax return in violation of 18 U. S. C. § 1001.1 The indictment alleged that respondent denied maintaining a foreign bank account at a time when he knew that he had such an account at the Castle Bank and Trust Company of Nassau, Bahama Islands. The Government’s case rested heavily on a loan guarantee agreement dated April 28, 1972, in which respondent pledged [729]*729the funds in his Castle Bank account as security for a $100,000 loan.
Respondent waived his right to jury trial and moved to suppress the guarantee agreement. With the consent of the parties, the United States District Court for the • Northern District of Ohio took evidence on the motion at a hearing consolidated with the trial on the merits. The court found respondent guilty as charged on the basis of all the evidence. The court also found, however, that the Government discovered the guarantee agreement by exploiting a flagrantly illegal search that occurred on January 15, 1973. The court therefore suppressed “all evidence introduced in the case by the Government with the exception of Jack Payner’s 1972 tax return . . . and the related testimony.” 434 F. Supp. 113, 136 (1977). As the tax return alone was insufficient to demonstrate knowing falsification, the District Court set aside respondent’s conviction.2
The events leading up to the 1973 search are not in dispute. In 1965, the Internal Revenue Service launched an investigation into the financial activities of American citizens in the Bahamas. The project, known as “Operation Trade Winds,” was headquartered in Jacksonville, Fla. Suspicion focused on the Castle Bank in 1972, when investigators learned that a suspected narcotics trafficker had an account there. Special Agent Richard Jaffe of the Jacksonville office asked Norman Casper, a private investigator and occasional informant, to learn what he could about the Castle Bank and its depositors. To that end, Casper cultivated his friendship with Castle [730]*730Bank vice president Michael Wolstencroft. Casper introduced Wolstencroft to Sybol Kennedy, a private investigator and former employee. When Casper discovered that the banker intended to spend a few days in Miami in January 1973, he devised a scheme to gain access to the bank records he knew Wolstencroft would be carrying in his briefcase. Agent Jaffe approved the basic outline of the plan.
Wolstencroft arrived in Miami on January 15 and went directly to Kennedy’s apartment. At about 7:30 p. m., the two left for dinner at a Key Biscayne restaurant. Shortly thereafter, Casper entered the apartment using a key supplied by Kennedy. He removed the briefcase and delivered it to Jaffe.' While the agent supervised the copying of approximately 400 documents taken from the briefcase, a “lookout” observed Kennedy and Wolstencroft at dinner. The observer notified Casper when the pair left the restaurant, and the briefcase was replaced. The documents photographed that evening included papers evidencing a close working relationship between the Castle Bank and the Bank of Perrine, Fla. Subpoenas issued to the Bank of Perrine ultimately uncovered the loan guarantee agreement at issue in this case.
The District Court found that the United States, acting through Jaffe, “knowingly and willfully participated in the unlawful seizure of Michael Wolstencroft’s briefcase....” Id., at 120. According to that court, “the Government affirmatively counsels its agents that the Fourth Amendment standing limitation permits them to purposefully conduct an unconstitutional search and seizure of one individual in order to obtain evidence against third parties. . . .” Id., at 132-133. The District Court also found that the documents seized from Wolstencroft provided the leads that ultimately led to the discovery of the critical loan guarantee agreement. Id., at 123.3 Although the search did not impinge upon the [731]*731respondent's Fourth Amendment rights, the District Court believed that the Due Process Clause of the Fifth Amendment and the inherent supervisory power of the federal courts required it to exclude evidence tainted by the Government’s “knowing and purposeful bad faith hostility to any person’s fundamental constitutional rights.” Id., at 129; see id., at 133, 134-135.
The Court of Appeals for the Sixth Circuit affirmed in a brief order endorsing the District Court’s use of its supervisory power. 590 F. 2d 206 (1979) (per curiam). The Court of Appeals did not decide the due process question. We granted certiorari, 444 U. S. 822 (1979), and we now reverse.
II
This Court discussed the doctrine of “standing to invoke the [Fourth Amendment] exclusionary rule” in some detail last Term. Rakas v. Illinois, 439 U. S. 128, 138 (1978). We reaffirmed the established rule that a court may not exclude evidence under the Fourth Amendment unless it finds that an unlawful search or seizure violated the defendant’s own constitutional rights. Id., at 133-140. See, e. g., Brown v. United States, 411 U. S. 223, 229-230 (1973); Alderman v. United States, 394 U. S. 165, 171-172 (1969); Simmons v. United States, 390 U. S. 377, 389 (1968). And the defendant’s Fourth Amendment rights are violated only when the challenged conduct invaded his legitimate expectation of privacy rather than that of a third party. Rakas v. Illinois, 439 U. S., at 143; id., at 149-152 (Powell, J., concurring) ; Combs v. United States, 408 U. S. 224, 227 (1972); Mancusi v. DeForte, 392 U. S. 364, 368 (1968).
The foregoing authorities establish, as the District Court recognized, that respondent lacks standing under the Fourth [732]*732Amendment to suppress the documents illegally seized from Wolstencroft. 434 F. Supp., at 126. The Court of Appeals did not disturb the District Court’s conclusion that “Jack Payner possessed no privacy interest in the Castle Bank documents that were seized from Wolstencroft.” Ibid.; see 590 F. 2d, at 207. Nor do we. United States v. Miller, 425 U. S. 435 (1976), established that a depositor has no expectation of privacy and thus no “protectable Fourth Amendment interest” in copies of checks and deposit slips retained by his bank. Id., at 437; see id., at 442. Nothing in the record supports a contrary conclusion in this case.4
[733]*733The District Court and the Court of Appeals believed, however, that a federal court should use its supervisory power to suppress evidence tainted by gross illegalities that did not infringe the defendant’s constitutional rights. The United States contends that this approach- — as applied in this case— upsets the careful balance of interests embodied in the Fourth Amendment decisions of this Court. In the Government’s view, such an extension of the supervisory power would enable federal courts to exercise a standardless discretion in their application of the exclusionary rule to enforce the Fourth Amendment. We agree with the Government.
Ill
We certainly can understand the District Court’s commendable desire to deter deliberate intrusions into the privacy of persons who are unlikely to become defendants in a criminal prosecution. See 434 F. Supp., at 135. No court should condone the unconstitutional and possibly criminal behavior of those who planned and executed this “briefcase caper.” 5 [734]*734Indeed, the decisions of this Court are replete with denunciations of willfully lawless activities undertaken in the name of law enforcement. E. g., Jackson v. Denno, 378 U. S. 368, 386 (1964); see Olmstead v. United States, 277 U. S. 438, 485 (1928) (Brandéis, J., dissenting). But our cases also show that these unexceptional principles do not command the exclusion of evidence in every case of illegality. Instead, they must be weighed against the considerable harm that would flow from indiscriminate application of an exclusionary rule.
Thus, the exclusionary rule “has been restricted to those areas where its remedial objectives are most efficaciously served.” United States v. Calandra, 414 U. S. 338, 348 (1974). The Court has acknowledged that the suppression of probative but tainted evidence exacts a costly toll upon the ability of courts to ascertain the truth in a criminal case. E. g., Rakas v. Illinois, 439 U. S., at 137-138; United States v. Ceccolini, 435 U. S. 268, 275-279 (1978); Stone v. Powell, 428 U. S. 465, 489-491 (1976); see Michigan v. Tucker, 417 U. S. 433, 450-451 (1974).6 Our cases have consistently recognized that unbending application of the exclusionary sanction to enforce ideals of governmental rectitude would impede unacceptably the truth-finding functions of judge and jury. E. g., Stone v. Powell, supra, at 485-489; United States v. Calandra, supra, at 348. After all, it is the defendant, and not the constable, who stands trial.
The same societal interests are at risk when a criminal defendant invokes the supervisory power to suppress evidence seized in violation of a third party’s constitutional rights. The supervisory power is applied with some caution even [735]*735when the defendant asserts a violation of his own rights.7 In United States v. Caceres, 440 U. S. 741, 754-757 (1979), we refused to exclude all evidence tainted by violations of an executive department’s rules. And in Elkins v. United States, 364 U. S. 206, 216 (1960), the Court called for a restrained application of the supervisory power.
“[A]ny apparent limitation upon the process of discovering truth in a federal trial ought to be imposed only upon the basis of considerations which outweigh the genera] need for untrammeled disclosure of competent and relevant evidence in a court of justice.” Ibid.
See also Nardone v. United States, 308 U. S. 338, 340 (1939).
We conclude that the supervisory power does not authorize a federal court to suppress otherwise admissible evidence on the ground that it was seized unlawfully from a third party not before the court. Our Fourth Amendment decisions have established beyond any doubt that the interest in deterring illegal searches does not justify the exclusion of tainted evidence at the instance of a party who was not the victim of the challenged practices. Rakas v. Illinois, supra, at 137; Alderman v. United States, 394 U. S., at 174-175.8 [736]*736The values assigned to the competing interests do not change because a court has elected to analyze the question under the supervisory power instead of the Fourth Amendment. In either case, the need to deter the underlying conduct and the detrimental impact of excluding the evidence remain precisely the same.
The District Court erred, therefore, when it concluded that [737]*737“society’s interest in deterring [bad faith] conduct by exclusion outweigh [s] society’s interest in furnishing the trier of fact with all relevant evidence.” 434 F. Supp., at 135. This reasoning, which the Court of Appeals affirmed, amounts to a substitution of individual judgment for the controlling decisions of this Court.9 Were we to accept this use of the supervisory power, we would confer on the judiciary discretionary power to disregard the considered limitations of the law it is charged with enforcing. We hold that the supervisory power does not extend so far.
The judgment of the Court of Appeals is
Reversed.