This appeal focuses on whether an Internal Revenue Service (“IRS”) summons is overbroad and whether enforcing the summons would violate the appellant’s Fifth Amendment privilege against compelled self-incrimination. For the reasons that follow, we affirm the order of the district court enforcing the summons.
I. BACKGROUND
During an investigation of the tax liability of the appellant, Walter L. Medlin, the IRS issued a summons to Medlin pursuant to the authority of 26 U.S.C. § 76021 to produce records possessed by him in his capacity as custodian of records, representative, registered agent, officer, director or stockholder of twenty named corporations. The summons sought documents “relating to” the twenty corporations “to include but not be limited to the following [14 categories].”2 Medlin refused to produce the doc*466uments and the IRS petitioned the United States District Court for the Middle District of Florida to enforce the summons. 26 U.S.C. §§ 7402(b)3 & 7604(b).4
The district court issued an order to show cause why the summons should not be enforced and later held a hearing pursuant to that order. At the hearing, Medlin maintained that 1) the summons was over-broad in that it did not specifically identify the documents sought, 2) complying with the summons would violate his Fifth Amendment privilege against compelled self-incrimination, 3) the IRS already possessed some of the documents it had requested from him and 4) he had no duty as a stockholder of the corporation to maintain or produce corporate records. The district court granted partial relief by modifying the summons so as to not require Medlin to produce any documents he held as a stockholder or any records already acquired by the government. The court denied the remaining grounds of relief and otherwise enforced the summons. Medlin has produced the fourteen specific categories of documents but on appeal asks to have the language “relating to” and “to include but not be limited to the following” stricken from the summons.
II. JURISDICTION AND STANDARDS OF REVIEW
We have jurisdiction to entertain an appeal of this final order of the district court pursuant to 28 U.S.C. § 1291. An order enforcing an IRS summons will not be reversed unless clearly erroneous. See La Mura v. United States, 765 F.2d 974, 981-82 (11th Cir.1985); United States v. Saunders, 951 F.2d 1065, 1066 (9th Cir. 1991). Whether enforcement of the summons as modified would violate Medlin’s Fifth Amendment privilege against compelled self-incrimination is a mixed question of law and fact. In re Grand Jury Subpoena, 957 F.2d 807, 809 (11th Cir.1992). We review the factual findings for clear error and the application of law to those facts de novo. Id.
III. DISCUSSION
In order to succeed in enforcing a summons, the IRS “must show that the investigation will be conducted pursuant to a legitimate purpose, that the inquiry may be relevant to the purpose, that the information sought is not already within the [IRS’s] possession, and that the administrative steps required by the Code have been followed.” United States v. Powell, 379 U.S. 48, 57-58, 85 S.Ct. 248, 255, 13 L.Ed.2d 112 (1964). The IRS may satisfy its minimal burden “merely by presenting the sworn affidavit of the agent who issued the summons attesting to these facts.” La Mura v. United States, 765 F.2d 974, 979 (11th Cir.1985). Once the showing required by Powell has been made, the “burden shifts to the party contesting the summons to disprove one of the four elements of the government’s prima facie showing or convince the court that enforcement of the summons would constitute an abuse of the court’s process.” Id. at 979-80. In this *467appeal, Medlin claims enforcement of the summons would be an abuse of the court’s process because 1) the summons is over-broad and 2) forcing him to comply with the summons would violate his Fifth Amendment privilege against compelled self-incrimination.
A. Overbreadth
An IRS summons is overbroad if it “does not advise the summoned party what is required of him with sufficient specificity to permit him to respond adequately to the summons.” United States v. Wyatt, 637 F.2d 293, 302 n. 16 (5th Cir. Feb. 17 1981).5 The summons, IRS Form 2039, requests “the following books, records, papers, and other data relating to the tax liability or the collection of the tax liability or for the purpose of inquiring into any offense connected with the administration or enforcement of the internal revenue laws concerning the person identified above for the periods shown.” The person identified as the object of the investigation is Walter L. Medlin. The records sought, as limited by the district court, are “All records in your custody, care, possession, or control [as custodian of records, representative, registered agent, officer or director] relating to the following [twenty] corporations ... for the period January 1, 1985 through December 31, 1988 to include but not be limited to the following [fourteen categories].”
The summons thus specified the subject matter of the documents requested, the source of those documents and the limited time period from which the documents were to be drawn. Medlin urges that the “relating to” and “to include but not be limited to the following” language could be read either to inject ambiguity into which documents are sought or to require him to produce all the records of the corporations for the four years specified, regardless of their relevance. However, the district court could reasonably find that the summons provides sufficient information such that Medlin is not required to blindly guess at what he must produce. The district court also could reasonably find that Medlin did not satisfy his burden of disproving the IRS’s showing of relevance under Powell. The district court’s finding rejecting the overbreadth challenge was not clearly erroneous.
B. Self-Incrimination
Medlin next argues that deciding which documents to produce and then actually producing them would constitute testimonial acts personally incriminating to him and would violate his Fifth Amendment privilege against compelled self-incrimination if used against him at trial. He is concerned whether Braswell v. United States, 487 U.S. 99, 108 S.Ct. 2284, 101 L.Ed.2d 98 (1988), provides the same protection for him as for the custodian subject to a grand jury subpoena in that case.
In Braswell the custodian of certain corporate records sought to avoid a grand jury subpoena on the ground that producing the requested records would be a personally incriminating testimonial act that could later be used against him in court. The Supreme Court held that the record keeper could not refuse to produce the records on that ground, but that his individual act of producing the documents could not be used against him in a criminal prosecution. If the custodian were later tried on criminal charges and the government used the documents he produced in response to the grand jury subpoena, the government could inform the jury that the corporation produced the records, but it could not disclose to the jury that the custodian personally did so on behalf of the corporation. Bras-well, 487 U.S. at 118, 108 S.Ct. at 295.
The IRS acknowledges, and we agree, that Medlin is entitled to the Braswell protections. He may not refuse to comply with the summons on grounds that his acts of selecting the documents to produce and producing those documents in his capacity as custodian for the corporations may be *468used to personally incriminate him. Braswell prohibits the revelation of his “individual act” of selecting and producing the records being used against him. Id.
Medlin also is fearful that his privilege against compelled self-incrimination is implicated because the summons calls on him to testify, not just produce the requested documents. To the extent that he will be called on merely to identify and authenticate the documents he is required to produce—which the government argues in its brief is the only testimony that will be sought from him—that argument is without merit. Braswell, 487 U.S. at 114-15, 108 S.Ct. at 2293-94 (citing Curcio v. United States, 354 U.S. 118, 125, 77 S.Ct. 1145, 1150, 1 L.Ed.2d 1225 (1957)). Such testimony merely makes explicit what is already implicit in complying with the summons. Id.
IV. CONCLUSION
The order of the district court enforcing the modified summons over Medlin’s objection that it is overbroad is not clearly erroneous. He may not refuse to comply with the summons on the ground that his Fifth Amendment privilege against compelled self-incrimination would be violated because he is entitled to the protections afforded by Braswell. Accordingly, the order of the district court is AFFIRMED.