Also known as: effectively unreviewable on appeal from final judgment · effectively unreviewable on appeal · collateral order doctrine · Cohen doctrine
Written by attorneys · grounded in primary & secondary sources — see below
A condition in the collateral order doctrine requiring that an interlocutory order address a right whose value would be irretrievably lost if appellate review were postponed until after final judgment. The condition is satisfied when the asserted right protects against the burdens of litigation itself rather than merely against an adverse result at trial. Orders denying claims of immunity from suit typically meet this requirement because the protection from standing trial cannot be restored by a later appeal.
Select any source to read its text and confirm it supports the definition.
Harbor Care moved for an order requiring malpractice plaintiffs to post a substantial bond under state law. The district court denied the motion. Harbor Care appealed immediately. The denial conclusively resolved the claimed statutory protection. That protection would be lost if the provider had to defend the case through trial without security, because later review could not restore the right to avoid bearing unrecoverable defense costs.
Officer Lewis moved for summary judgment on qualified immunity in a section 1983 excessive-force suit. The district court denied the motion after finding genuine issues of material fact. Lewis appealed at once. The denial resolved his claimed right not to stand trial. That right would be destroyed by forcing him to endure the burdens of litigation, which later appellate review could not undo.
Mohawk was ordered to produce documents it claimed were protected by attorney-client privilege. The district court found waiver and compelled disclosure. Mohawk sought immediate review. The order did not satisfy the unreviewability condition because any error could be corrected on appeal from final judgment by ordering a new trial or suppressing the evidence.
Former President Nixon asserted absolute immunity from suit in a damages action arising from official acts. The district court rejected the claim. Nixon appealed immediately. The denial resolved a claimed right not to be subjected to the burdens of litigation at all. That protection would be lost if review waited until after trial.
Plaintiffs sought class certification in a securities suit. The district court denied the motion. Plaintiffs appealed at once. The order failed the unreviewability prong because any error could be reviewed and remedied after final judgment by decertifying the class or ordering a new trial limited to class issues.
The Vice President asserted executive privilege in response to discovery requests in a civil suit. The district court rejected the claim and ordered production. The government sought immediate review. The order did not meet the unreviewability condition because any harm from disclosure could be addressed through protective orders or post-judgment remedies.
Denial satisfies the prong only when the bond protects against a right that would be destroyed by having to litigate without security. Routine cost-allocation orders do not qualify because any error can be corrected after final judgment through cost-shifting or damages adjustments.
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…determine the disputed question, resolve an important issue completely separate from the merits of the action, and [are] effectively unreviewable on appeal from a final judgment." Coopers & Lybrand v. Livesay , 437 U. S. 463, 468 (1978); see Cohen, supra , at 546-547. As an additional requirement, Cohen established that a collateral appeal…
…issued, we need not decide whether the Vice President also could have
…conclusively determine the disputed question, resolve an important issue completely separate from the merits of the action, and
…to be denied immediate review, Cohen, supra , at 545–546. “That small category includes only decisions that are . . .
Immunity from suit protects against the burdens of litigation itself. Once a defendant is forced to stand trial, that protection is lost forever and cannot be restored by later appellate review of the final judgment.
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It does not when a protective order limits use and requires return of materials. Any harm from improper disclosure can be remedied after final judgment through sanctions, exclusion of evidence, or a new trial.
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The prong narrows the collateral order exception by requiring that the right at stake would be irretrievably lost without immediate review. Orders that can be meaningfully reviewed after final judgment remain subject to the final judgment rule.
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