Ex parte refers to a legal proceeding, application, or order made at the instance of one party only, without notice to or participation by the other affected party. In Canadian law, ex parte procedures are recognised as exceptional departures from the ordinary principle of procedural fairness, which ordinarily requires that all affected parties be given notice and an opportunity to be heard. Since ex parte proceedings engage fundamental fairness concerns, they are permitted only where clearly justified by necessity or urgency. 

Rationale and Justification

The justification for ex parte relief lies in circumstances where giving notice would defeat the purpose of the application or cause irreparable harm. Typical rationales include:

• the risk that evidence will be destroyed or concealed;
• the likelihood that assets will be dissipated;
• urgent protection of vulnerable persons or public safety;
• the need to preserve the status quo pending a full hearing.

Canadian courts balance urgency against fairness, recognising that ex parte relief must remain tightly controlled. 

Common Contexts for Ex Parte Proceedings

Ex parte applications arise in various areas of Canadian law, including:

• interim injunctions and preservation orders;
• search warrants and production orders in criminal investigations;
• emergency family law or child protection orders;
• freezing orders and asset preservation measures;
• certain administrative and regulatory proceedings.

In each context, the exceptional nature of the process remains central.

Duty of Full and Frank Disclosure

A defining feature of ex parte proceedings is the heightened duty imposed on the applicant to make full, fair, and frank disclosure of all material facts, including those adverse to their position. The absence of the opposing party places the court at an informational disadvantage, and the applicant must compensate for that imbalance. Failure to meet this duty may result in the order being set aside, costs being awarded against the applicant, or other sanctions, regardless of the merits of the underlying claim.

Judicial Scrutiny and Thresholds

Canadian courts subject ex parte applications to careful scrutiny. Applicants must typically demonstrate:

• a strong prima facie case or serious issue to be tried;
• genuine urgency or necessity;
• proportionality between the relief sought and the harm alleged;
• the absence of reasonable alternatives involving notice.

The evidentiary burden is often higher than in inter partes applications.

Temporary and Interim Nature of Relief

Ex parte orders are generally interim in nature. They are designed to provide short-term relief until the affected party can be notified and heard. Courts routinely require that:

• the order be time-limited;
• the matter be promptly brought back before the court on notice;
• the respondent be given an early opportunity to challenge the order.

This ensures that procedural fairness is restored as quickly as possible.

Rights of the Affected Party

Once notified, the affected party has the right to:

• challenge the factual and legal basis of the order;
• seek variation or discharge of the order;
• raise issues of non-disclosure or misrepresentation.

Canadian courts take allegations of abuse of ex parte procedures seriously, given their impact on fairness and confidence in the justice system. 

Conclusion

Ex parte orders can have immediate and significant consequences, including restraint of liberty, restriction of property rights, or interference with private affairs. As a result, misuse of ex parte procedures can undermine trust in judicial processes. In Canadian law, ex parte proceedings are not a convenience but an exception. They are permitted only where necessity demands, fairness is preserved through strict disclosure obligations, and the court retains close supervisory control.