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Find a Lawyer » Canada Legal Guides » Ontario Legal Guides » Family Law & Divorce Ontario » How to Issue a Summons to Witness (Form 23) in Ontario Family Court

How to Issue a Summons to Witness (Form 23) in Ontario Family Court

12 Jun 2026 5 min read No comments Family Law & Divorce Ontario
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To legally force a reluctant witness to testify at your Ontario family law trial, you must issue a Form 23 Summons to Witness. You must serve this document personally and pay them mandatory attendance money upfront, currently set at $50 CAD per day plus travel allowances.

When an Ontario family law dispute reaches the trial stage, the outcome relies entirely on the quality of your evidence. Often, the most crucial facts regarding parenting time or spousal support are held by third parties who have no desire to get involved in your personal drama. A child’s teacher, a family doctor, or a corporate accountant may politely decline your request to testify, wishing to remain neutral. In these situations, a polite request is no longer enough; you need the coercive power of the court.

In Ontario, a Summons to Witness (Form 23) is a powerful legal command issued by the Superior Court of Justice or the Ontario Court of Justice. It legally compels an individual to attend your trial and answer questions under oath. Ignoring a formally issued summons is a serious offence that can lead to a warrant for the witness’s arrest. Properly drafting and serving this document is highly technical. If you are preparing for a trial in Toronto, Brampton, or Ottawa, it is strongly advised to browse our directory for a seasoned family lawyer to manage your witness subpoenas.

Step-by-Step Process in Ontario Family Court

Issuing a Form 23 is not simply a matter of mailing a letter. The Family Law Rules mandate a strict procedural pathway to ensure the witness’s rights are respected while guaranteeing their presence at your hearing.

Step 1: Determine if the Witness is Truly Necessary

Before issuing a summons, ensure the witness’s testimony is strictly relevant to the legal test at hand. 🔍 Judges do not appreciate having their time wasted by “character witnesses” who just want to say you are a nice person. You need witnesses who have direct, factual knowledge about hidden income, domestic incidents, or issues affecting decision-making responsibility.

Step 2: Complete the Form 23 Document

You or your lawyer must prepare the Form 23. This document tells the witness exactly which courthouse to attend, the date and time of the trial, and the legal consequences of failing to appear. Additionally, if you need the witness to bring specific documents (like a teacher bringing attendance records or an accountant bringing CRA tax filings), you must explicitly list those items in the summons.

Step 3: Issue the Summons at the Court Counter

A Form 23 is not valid until it is formally “issued” by the court. You must take the drafted document to the clerk at your local family courthouse. The clerk will review it, sign it, date it, and apply the official seal of the Ontario court. Only then does it become a legally binding order.

Step 4: Calculate and Prepare Attendance Money

You cannot force someone to take a day off work to testify for free. Under Ontario law, you must pay the witness “attendance money” at the exact moment you hand them the summons. This compensates them for their time and travel. You must calculate the daily fee plus the exact mileage from their home to the courthouse.

Step 5: Serve the Summons Personally

A Summons to Witness cannot be emailed, mailed, or left with a roommate. It must be served via “personal service.” This means a process server, your lawyer, or another adult must physically hand the Form 23 and the envelope containing the attendance money directly into the hands of the witness.

How Much Does it Cost in Ontario?

Compelling a witness involves specific statutory fees that you must pay out-of-pocket before the trial begins:

  • Court Issuing Fee: Currently, there is generally a $0 CAD filing fee to simply issue a family court form at the counter, but you pay for the preparation.
  • Mandatory Attendance Money: In Ontario, the standard witness fee is exactly $50 CAD per day of required attendance.
  • Travel Allowance: You must also pay a mileage fee based on the distance between their residence and the courthouse (usually around $0.30 to $0.50 CAD per kilometre, depending on the exact judicial regulations). If they live out of town, overnight hotel and meal allowances apply.
  • Process Server Fees: Hiring a professional to physically track down and serve the witness usually costs between $100 and $250 CAD per attempt.
  • Lawyer Fees: Having a law firm prepare the strategy and draft the summons generally incurs 1 to 2 hours of billing, roughly $300 to $800 CAD.
Type of WitnessAre They Usually Summoned?Special Considerations
Teachers / Daycare WorkersYes (Often Reluctant)Will usually require a summons to bring attendance or behavioural records without violating privacy policies.
Family Doctors / TherapistsYes (Highly Reluctant)Often require a court order to release medical files due to strict health privacy laws.
The Children of the MarriageAbsolutely NotOntario judges severely reprimand parents who attempt to subpoena their own children to testify. Use the Office of the Children’s Lawyer instead.

How Long Does the Process Take?

Do not leave your subpoenas to the last minute. ⌛ Preparing and issuing the Form 23 takes a few days, but successfully locating and personally serving a witness can take weeks, especially if they are actively dodging service. Under the Family Law Rules, you must serve the summons on the witness within a “reasonable time” before the trial. As a general best practice, aim to serve the document at least 2 to 4 weeks before their scheduled testimony date.

Frequently Asked Questions (FAQ)

What happens if the witness just throws the summons away?

If a witness was properly served with the Form 23 and the attendance money but fails to show up to court, the judge can issue a “warrant for arrest.” The local police will be dispatched to apprehend the witness and bring them directly to the courthouse.

Do I have to pay an expert witness the standard $50?

While the statutory attendance money is $50 CAD, expert witnesses (like private accountants or psychologists) will charge you their professional hourly rate to prepare for and attend trial. You are responsible for their full professional invoice.

Can a witness refuse to answer a question on the stand?

Generally, no. Once sworn in, a witness must answer all questions directed by the lawyers and the judge truthfully. The only exception is if the judge rules a specific question is irrelevant or protected by a rare legal privilege.

Can I subpoena someone who lives in a different province?

Issuing a summons across provincial borders is highly complex and involves specific inter-provincial legislation. An Ontario Form 23 does not automatically compel a resident of Alberta. You will absolutely need an experienced lawyer to navigate an out-of-province subpoena.

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