Motion to Quash

A motion to quash is a procedural device by which a party asks a court to nullify or void some earlier legal step on the ground that it was defective, unlawful, or improperly issued. The word "quash" comes from the Anglo-French quasser (to annul) and survives in common-law procedure across the United States, the United Kingdom, India, the Philippines, and other Commonwealth-influenced systems.

The motion can target a range of instruments:

• Subpoenas — for being overly broad, unduly burdensome, seeking privileged material, or improperly served. In U.S. federal practice this is governed by Rule 45(d)(3) of the Federal Rules of Civil Procedure and Rule 17(c) of the Federal Rules of Criminal Procedure.
• Indictments or informations — for defects such as a grand jury irregularity, lack of jurisdiction, or failure to state an offense.
• Service of process — when the summons was not properly delivered.
• Search warrants, arrest warrants, or arrests — when issued without probable cause or in violation of statutory requirements.

In India, the term has particular prominence through Section 482 of the Code of Criminal Procedure, 1973 (now Section 528 of the Bharatiya Nagarik Suraksha Sanhita, 2023), which preserves the inherent power of High Courts to quash criminal proceedings to prevent abuse of process or secure the ends of justice. The Supreme Court's framework in State of Haryana v. Bhajan Lal (1992) lists categories where quashing is appropriate.

In English law, the equivalent prerogative remedy in administrative cases is the quashing order (formerly certiorari), used by the Administrative Court to nullify decisions of public bodies that exceed jurisdiction or breach natural justice.

A successful motion does not usually decide the underlying merits; it simply removes the defective instrument, often allowing the moving party to avoid compliance or the opposing party to reissue a corrected version.