The IRS summons is one of the agency's most powerful investigative tools. Under Section 7602 of the Internal Revenue Code, the IRS may issue an administrative summons to examine any books, papers, records, or other data that may be relevant to determining the correctness of any return, making a return where none has been filed, or determining the liability of any person for any internal revenue tax. The Fifth Circuit, which covers Mississippi, Louisiana, and Texas, has a substantial body of case law addressing the scope and limits of this power — and understanding those limits is critical for any taxpayer or tax professional who receives an IRS summons.^[1]

The Powell Requirements

The foundational case on IRS summons enforcement is the Supreme Court's decision in United States v. Powell, which established the four requirements the IRS must satisfy before a court will enforce a summons. First, the investigation must be conducted pursuant to a legitimate purpose. Second, the inquiry must be relevant to that purpose. Third, the information sought must not already be within the IRS's possession. Fourth, all required administrative steps must have been followed.^[2]

The IRS's burden of establishing these four elements is not onerous. The agency typically meets it by submitting an affidavit from the examining agent attesting to the purpose of the investigation and the relevance of the requested documents. Once the IRS makes this initial showing, the burden shifts to the taxpayer to demonstrate that enforcement would be improper — for example, because the summons was issued for an improper purpose, the documents are protected by privilege, or the IRS has already referred the matter for criminal prosecution.

The Good Faith Requirement

The Fifth Circuit has emphasized that an IRS summons must be issued in good faith. This means the IRS cannot use a summons for purposes unrelated to legitimate tax administration. If a taxpayer can establish that the summons was issued solely to harass, to pressure the taxpayer into settling a collateral dispute, or to gain a litigation advantage, the court may quash the summons.^[3]

In practice, this is a difficult standard for taxpayers to meet. Courts generally presume that the IRS is acting in good faith, and the taxpayer must present specific evidence — not mere speculation — of improper purpose. General allegations that the IRS is conducting a "fishing expedition" or that the investigation is excessive are typically insufficient.

The Section 7602(d) Limitation: DOJ Referrals

One of the most significant limitations on IRS summons authority arises when the IRS has referred the matter to the Department of Justice for criminal prosecution. Under Section 7602(d), once a Justice Department referral is in effect, the IRS may not issue any summons with respect to the person who is the subject of the referral. This restriction exists to prevent the IRS from using its civil summons power — which has a lower standard than a criminal subpoena — to gather evidence for a criminal prosecution.^[4]

The Fifth Circuit has addressed situations in which taxpayers allege that a DOJ referral has been made but the IRS denies it. The court has held that the IRS's denial, supported by an affidavit from an appropriate official, is generally sufficient to defeat this defense absent specific evidence to the contrary.

Privilege Protections

Several privileges may protect documents from disclosure in response to an IRS summons. The attorney-client privilege protects confidential communications between a client and an attorney made for the purpose of obtaining legal advice. The work product doctrine protects documents prepared in anticipation of litigation. And Section 7525 extends a limited form of the attorney-client privilege to communications between a taxpayer and a federally authorized tax practitioner (such as a CPA or enrolled agent) in connection with tax advice.

The Fifth Circuit has construed these privileges narrowly in the summons enforcement context. The Section 7525 privilege, in particular, does not apply to communications related to tax return preparation (as opposed to tax advice) and does not apply to any written communication in connection with the promotion of a tax shelter. Taxpayers who rely on the privilege to resist a summons must demonstrate that each withheld document falls within the scope of the privilege, typically through a detailed privilege log.

Practical Considerations for Taxpayers

A taxpayer who receives an IRS summons should not ignore it. Failure to comply with a summons can result in the IRS seeking a court order to enforce the summons, and continued non-compliance can result in a finding of contempt, which carries the possibility of fines and imprisonment. The appropriate response is to evaluate the scope of the summons, identify any legitimate objections (privilege, relevance, overbreadth), and either comply with the portions of the summons that are unobjectionable or negotiate with the IRS to narrow the scope of the request.

If the IRS seeks judicial enforcement, the taxpayer has the opportunity to raise objections before the court. The Fifth Circuit's case law provides a framework for evaluating those objections, but taxpayers should understand that courts generally favor enforcement and that successful challenges to IRS summonses are the exception rather than the rule. Early engagement with experienced tax counsel is essential to preserving available defenses and avoiding unnecessary exposure to penalties.