The Supreme Court rejected two absolute positions
On June 18, 2026, the Supreme Court decided Hunter v. United States and held that an agreement not to appeal a federal sentence is unenforceable when enforcement would result in a miscarriage of justice. The Court rejected the Government's position that a knowing and voluntary appeal waiver must always be enforced. It also rejected the Fifth Circuit's rule limiting an exception to sentences that exceed the statutory maximum.
The holding recognizes a narrow judicial safeguard rather than a general escape from a plea agreement. Appeal waivers remain presumptively enforceable, and the Court emphasized that the miscarriage-of-justice standard is demanding. The decision changes the legal framework, but it does not mean that ordinary sentencing disagreement, a debatable Guidelines calculation, or a later change of mind will overcome a valid waiver.
What happened in Hunter
Hunter pleaded guilty in federal court to possessing a firearm as a felon. His written agreement waived the right to appeal the sentence on most grounds. The district court imposed a prison term followed by supervised release and included a condition allowing a probation officer, in consultation with a treatment provider, to require Hunter to take prescribed psychiatric medication. Hunter appealed that condition.
The Fifth Circuit enforced the waiver because the sentence did not exceed the statutory maximum. The Supreme Court vacated that judgment. It did not decide whether the medication condition itself produced a miscarriage of justice; it returned the case so the lower court could apply the newly announced standard to Hunter's specific claim.
Government silence at sentencing did not forfeit the waiver
Hunter also argued that the Government lost the benefit of the appeal waiver by failing to object when the district judge advised him at sentencing that he had a right to appeal. The Supreme Court disagreed. Because no appeal had yet been filed, there was no occasion at sentencing for the Government to invoke the waiver as a defense to an appeal.
The Court explained that the appropriate time to rely on the waiver is after the defendant appeals. A sentencing court's general advice about appellate rights therefore should not be treated as a ruling that silently modifies the written plea agreement. The agreement, plea colloquy, oral pronouncement, written judgment, notice of appeal, and Government's appellate response should each be reviewed in their proper procedural sequence.
Knowing and voluntary remains the first question
An appellate court should not enforce a waiver that was not entered knowingly and voluntarily. Rule 11 of the Federal Rules of Criminal Procedure requires the district court, before accepting a guilty plea, to address a defendant personally and determine that the plea is voluntary. When a plea agreement contains a waiver of appeal or collateral attack, the court must inform the defendant of the waiver's terms and determine that the defendant understands them.
That inquiry is record-based. Relevant material includes the complete written agreement, any addendum, the change-of-plea transcript, interpreter record, competency information, counsel's advice, promises or threats, and the court's explanation of the rights surrendered. Hunter did not replace this threshold analysis; it adds a separate limit that may matter even when the waiver itself was knowing and voluntary.
Miscarriage of justice is a high bar
The Court did not create a closed list of qualifying circumstances. Instead, it directed courts to determine whether enforcing the waiver would seriously affect the fairness, integrity, or public reputation of judicial proceedings. The inquiry is contextual and should account for the gravity and clarity of the asserted error, the interests protected by the waiver, and the justice system's responsibility for the challenged action.
The opinion's refusal to make the examples exhaustive is important, but so is its repeated description of the exception as rare. A defendant should identify the precise sentence or condition, the legal authority allegedly violated, whether the objection was preserved, what relief is requested, and why enforcement would harm the justice system beyond the ordinary consequence of holding a party to an agreement.
The waiver does not prevent a notice of appeal
An appeal waiver is not the same as a jurisdictional bar and does not physically prevent a defendant from filing a notice of appeal. The Government generally raises the agreement in the appellate proceeding, and the court then determines its validity, scope, and enforceability. Federal Rule of Appellate Procedure 4(b) still imposes a short deadline for a criminal defendant's notice of appeal, ordinarily 14 days after entry of the judgment or order being appealed.
Counsel should not assume that the presence of a waiver eliminates the need to consult about an appeal. Nor should a defendant wait for a final answer about the waiver before protecting the notice deadline. Whether a late filing can be excused, whether counsel disregarded a request to appeal, and whether a particular issue falls outside the waiver are distinct questions governed by their own standards.
Scope must be analyzed before the exception
A waiver reaches only the matters its language actually covers. Some agreements exclude claims that a sentence exceeds the statutory maximum, challenges to an upward departure or variance, prosecutorial appeals, ineffective assistance affecting the plea, or specified constitutional claims. Others distinguish a direct-appeal waiver from a waiver of collateral review under 28 U.S.C. § 2255.
The analysis should therefore begin with the exact text and the issue presented. If a claim lies outside the waiver, there may be no need to invoke Hunter's miscarriage-of-justice exception. Ambiguity, Government breach, an issue arising after the agreement, or a sentence based on a condition not contemplated by the parties may present separate contract, due-process, or enforcement questions.
Post-conviction consequences require care
Hunter arose on direct appeal from a federal sentence. It does not itself invalidate every collateral-attack waiver or authorize an otherwise untimely § 2255 motion. A post-conviction filing must separately address custody, the one-year limitation period, procedural default, prior petitions, the available remedy, and the controlling law of the circuit hearing the case.
An ineffective-assistance claim directed at the plea or waiver may require evidence about counsel's advice and the defendant's decision-making. A claim attacking only counsel's performance at sentencing may be treated differently if the waiver expressly covers collateral review. The text of the agreement and the circuit's cases remain critical; Hunter supplies a federal appellate enforcement principle, not a universal reopening rule.
Practical record review
Start with a timeline and the original documents. Obtain the indictment, plea agreement and supplements, plea transcript, presentence report and objections, sentencing memorandum, sentencing transcript, statement of reasons, written judgment, and any notice of appeal or appellate correspondence. Compare the oral sentence with the written judgment and identify the source of every challenged condition.
Then organize the legal questions in order: validity of the plea and waiver; scope of the waiver; any Government breach; preservation and standard of review; the asserted error; and, only if necessary, whether enforcement would produce a miscarriage of justice under Hunter. Keeping those questions separate prevents a strong threshold argument from being buried inside a generalized fairness claim.
- Calendar the appellate deadline without assuming the waiver makes a notice unnecessary.
- Quote the operative waiver language and every express exception precisely.
- Identify whether the issue concerns direct appeal, collateral review, or both.
- Explain why the alleged error implicates the fairness and integrity of the judicial process, not merely why the sentence is unfavorable.
Limits and caution
The Supreme Court did not decide that Hunter's medication condition was unlawful or that his waiver was ultimately unenforceable. The Fifth Circuit must address that question on remand. Future courts will develop the contours of the standard, and the result will depend on the agreement, the issue, the record, the applicable standard of review, and circuit precedent.
Plea and appellate deadlines can be short, while post-conviction time limits and waiver doctrines create additional barriers. A person considering a challenge should obtain the complete record and identify the relevant jurisdiction promptly. This article provides general educational information, not legal advice, a deadline calculation, or a prediction that a waiver will be set aside.