If your final Ontario family court order contains a typo, misspelling, or a simple math error, you do not need to file a formal appeal. You can use Rule 25(19) of the Family Law Rules-known as the “Slip Rule”-to request a correction. Hiring a lawyer to draft a Form 14B motion for this usually costs between $500 and $1,500 CAD.
After enduring months or even years of litigation in the Ontario Superior Court of Justice, finally receiving your signed court order brings immense relief. However, that relief can quickly turn into panic if you read the document and discover a glaring mistake. Whether your child’s name is spelled incorrectly, the start date for spousal support is off by a year, or the judge made an obvious mathematical error when calculating the equalization of net family property, minor errors can cause major logistical headaches with banks and government agencies.
Fortunately, the Ontario justice system recognizes that judges and court clerks are human and make typographical mistakes. 🚨 You do not need to launch an expensive and lengthy legal appeal to fix a simple clerical error. The Family Law Rules contain a specific provision, commonly referred to as the “Slip Rule,” which allows the court to quickly amend a final order to reflect the true intention of the judge’s original decision.
Step-by-Step Process: Using Rule 25 in Ontario
Rule 25(19) of the Family Law Rules explicitly states that an order may be changed if it contains an error arising from an accidental slip or omission. Whether you are finalizing a divorce in Toronto, Brampton, or Kingston, the procedure to correct these mistakes is highly standardized.
Step 1: Identify the Nature of the Error
Before doing anything, you must confirm that the mistake is genuinely a “slip.” The Slip Rule can fix a misspelled address, an incorrect date, or a basic math calculation regarding child support arrears. 📄 However, you cannot use this rule if you simply disagree with the judge’s legal reasoning or if the judge genuinely decided against you based on the evidence. For substantive legal errors, you must file a formal appeal.
Step 2: Seek the Consent of the Opposing Party
The fastest way to fix a typo is to get your ex-spouse (or their law firm) to agree that a mistake was made. Contact the opposing party in writing, point out the specific error on the page, and ask for their consent to change it. If both sides agree that the child’s birth year is 2014, not 2004, the court will process the correction much faster without requiring a formal hearing.
Step 3: Draft a Form 14B (Motion in Writing)
To officially ask the court for the correction, you must complete a Form 14B: Motion Form. This specific form is used in Ontario for straightforward, procedural matters that do not require oral arguments in a courtroom. 📰 In your Form 14B, you will state the exact paragraph that needs fixing, how it should read, and cite Rule 25(19). If your ex-spouse consented in Step 2, you will check the “On Consent” box, which practically guarantees swift approval.
Step 4: Submit to the Court Clerk
File your Form 14B with the local family court counter or through the Ontario Justice Services Online portal. A court clerk will route the form directly back to the specific judge who signed the original order. The judge will review the request, cross-reference it with their trial notes, and if they agree it was a simple omission, they will sign an amended version of the order.
How Much Does it Cost in Ontario?
Correcting a typo should not bankrupt your family. Because this procedure bypasses a full courtroom appearance, the costs are relatively low. 💰 As of May 2026, here is what you should expect to pay in Canadian dollars (CAD):
- Court Filing Fees: If the motion is filed “on consent” (both parties agree to the fix), there is generally no filing fee ($0 CAD). If it is contested, the standard motion fee is approximately $167 CAD.
- Lawyer Drafting Fees: If you hire a family law firm to negotiate with your ex and draft the Form 14B perfectly, most lawyers will charge a flat fee or 1-2 hours of their time, ranging from $500 to $1,500 CAD.
- Enforcement Costs: If the error delayed the Family Responsibility Office (FRO) from garnishing support, correcting it quickly saves you from thousands of dollars in delayed payments.
How Long Does the Process Take?
The timeline for the Slip Rule is heavily dependent on court backlogs in your specific Ontario city. If you file a Form 14B on consent, it is usually placed on the judge’s desk quickly, and you may receive your amended order within 2 to 4 weeks. If your ex-spouse unreasonably refuses to consent and you must file a contested motion, it may take 4 to 8 weeks for a judge to review the file and issue the correction in writing.
Frequently Asked Questions (FAQ)
What if the judge forgot to include an entire issue we discussed at trial?
Rule 25(19) also covers accidental omissions. If the judge clearly stated in their oral reasons that you get to keep the family car, but the final written order completely forgot to include that paragraph, the Slip Rule can be used to insert the missing asset.
Can I use the Slip Rule if I forgot to submit evidence at trial?
No. The Slip Rule is strictly for errors made by the court in writing the order. It is not a “do-over” for you to present new evidence or fix a mistake your lawyer made during the trial. That would require a motion to reopen the case or an appeal.
Does my ex have to sign the new order?
If the motion is brought on consent, their lawyer will sign off on the draft. If it is contested, they do not need to sign anything. The judge has the unilateral authority to correct their own clerical errors and will simply issue the amended document.
Can the Slip Rule be used for Separation Agreements?
No. The Family Law Rules apply strictly to court orders. If there is a typo in a private separation agreement, you and your ex must sign a legal addendum or a brand-new contract with your lawyers to correct the mistake.
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