Definition
A peremptory mandamus is a writ of mandamus that commands a party to perform a specific act absolutely and unconditionally, admitting no further excuse or alternative. It issues without qualification and brooks no return except full compliance.
In the traditional procedural sequence of mandamus practice, the peremptory mandamus is the final and decisive writ — the command that follows after a party has failed to justify noncompliance. It is distinguished from the alternative mandamus, which opens the proceeding by ordering the respondent either to do the required act or to show sufficient cause why it should not be compelled. Where the respondent's return to the alternative writ is found legally insufficient or factually false, the court issues the peremptory mandamus as the definitive order, leaving the respondent no further avenue for excuse.
In some courts and circumstances, where it is apparent from the outset that no legitimate cause can be shown, a peremptory mandamus may be granted in the first instance — that is, without first issuing an alternative writ.
---
Common Confusion
PEREMPTORY MANDAMUS vs. ALTERNATIVE MANDAMUS: These two forms work in sequence, and researchers encountering one should look for the other. The alternative mandamus gives the respondent a choice — comply or explain. The peremptory mandamus eliminates that choice. Conflating them distorts the procedural posture of a case: a reported decision on a peremptory mandamus presupposes that the respondent already had and failed to use an opportunity to resist. The peremptory writ is the conclusion of the mandamus proceeding, not its beginning.
PEREMPTORY MANDAMUS vs. PEREMPTORY CHALLENGE: The shared modifier "peremptory" causes confusion when researchers encounter the term outside the mandamus context. A peremptory challenge in jury selection is an entirely different doctrine — the right to strike a juror without stated cause. The connection is only linguistic. See Jury Selection — Voir Dire, Peremptory Challenges, and Batson (The Law Mind Criminal Law Encyclopedia) for the unrelated jury doctrine.
---
Why It Matters in Research
Researchers working in older equity and administrative law sources must understand the alternative/peremptory sequence to accurately reconstruct what happened procedurally in a given case. Historical reports often mention only that a peremptory mandamus issued, without tracing the earlier alternative writ — but the grant of a peremptory writ necessarily implies that a prior proceeding occurred in which the respondent's position was tested and rejected. Missing this context distorts any analysis of the court's reasoning or the respondent's conduct.
The distinction between discretionary and ministerial acts is foundational to mandamus doctrine and is directly implicated by the peremptory form. A peremptory mandamus will not issue to compel a discretionary act — courts can only compel with finality what the respondent is legally obligated to do without room for judgment. Research into whether a peremptory writ should have issued almost always requires resolving the ministerial/discretionary question first.
Modern practice has substantially collapsed the two-writ sequence in many jurisdictions. Contemporary mandamus proceedings often proceed on a single petition and order without separately denominated alternative and peremptory writs. This means the term "peremptory mandamus" appears heavily in sources predating the mid-twentieth century and with declining frequency in modern reporters. Researchers using Law Mind's historical corpus should not assume that the absence of the term in modern materials signals that the underlying doctrine has disappeared — it has largely been absorbed into unified mandamus procedure.
The phrase "in the first instance" in connection with peremptory mandamus is a recurring signal in historical sources worth flagging. When courts granted a peremptory writ in the first instance, it indicated a determination that the respondent's legal obligation was so clear that even the preliminary alternative-writ stage was unnecessary. This represents a heightened judicial posture and should be read as such.
---
Historical Dictionary Support
The three shelf sources converge on the core definition without meaningful disagreement: a peremptory mandamus absolutely requires performance and admits no return except obedience. The sequencing — alternative writ first, peremptory writ upon insufficient return — appears consistently across Black's, Bouvier's, and Burrill's.
Bouvier's is the most compressed, capturing the doctrine in two sentences and citing Blackstone's Commentaries. Black's is the most procedurally detailed, specifying that the peremptory issues "in the second place" and that no further return is permitted. Burrill's adds the important qualification that the peremptory writ may issue where the return to the alternative writ is "insufficient in law or false in fact" — a useful reminder that the respondent's return fails on either legal or factual grounds, not only legal ones.
None of the historical sources address the modern erosion of the two-writ sequence or the consolidation of mandamus procedure. Researchers relying solely on these sources would have no indication that contemporary practice often bypasses the formal alternative/peremptory distinction. This is the principal gap in the historical dictionary coverage.
---
Jurisdictional Note
Modern mandamus procedure varies significantly across federal and state courts. Federal practice under the All Writs Act and the Federal Rules has largely abandoned the formal two-writ nomenclature. Several states retain distinct procedural steps analogous to the historical alternative/peremptory sequence, while others have unified the process by statute or rule. Research into whether a peremptory mandamus may issue in the first instance requires checking current procedural rules for the jurisdiction at issue.
---
Encyclopedia Cross-Reference
Mandamus — Compelling Government Action, Clear Right, and Ministerial vs. Discretionary Acts (The Law Mind Remedies & Equity Encyclopedia)
---