To invalidate a Marriage Contract (prenup) in New Brunswick, you must apply to the Court of King’s Bench and prove severe flaws such as financial fraud, extreme duress at signing, or a lack of Independent Legal Advice (ILA). A grossly unfair contract may be set aside entirely.
When you are facing a separation in New Brunswick, discovering that your prenuptial agreement leaves you with almost nothing can be terrifying. Many people assume that because a contract is signed, it is completely unbreakable. However, under Canadian family law, a Domestic Contract is not always an impenetrable shield.
If the agreement was signed under suspicious circumstances, or if your ex-spouse hid significant wealth from you, the court has the absolute authority to step in. Judges prioritize transparency and fundamental fairness. In this guide, we will walk you through the realistic legal strategies your lawyer can use to challenge an unfair agreement.
Step-by-Step Process to Challenge a Marriage Contract
Invalidating a signed legal document is a complex legal battle. Whether your divorce is filed in Bathurst, Moncton, or Saint John, the procedural steps at the Court of King’s Bench require solid evidence and precise legal arguments.
Step 1: Review the Independent Legal Advice (ILA)
The very first thing your family lawyer will look for is the Certificate of Independent Legal Advice . If you were never given the opportunity to have your own separate lawyer explain the contract to you, or if you were forced to use your spouse’s lawyer, the contract is immediately highly vulnerable. The court views a lack of ILA as a massive red flag.
Step 2: Investigate Financial Non-Disclosure
For a prenup to be legally binding, both parties must have provided full and honest financial disclosure before signing. If you discover that your ex-spouse had a secret offshore bank account, an undisclosed corporation, or significantly downplayed the value of their real estate in April 2026, your lawyer can argue that the contract was built on fraud. Hidden assets are one of the most common reasons a judge will shred an agreement.
Step 3: Assess the Circumstances of Signing (Duress)
Did your partner hand you the contract on the night before your wedding and threaten to cancel the ceremony if you didn’t sign? This is legally known as “duress.” A valid contract must be signed voluntarily and with ample time to think. If you can prove you were heavily coerced or blackmailed, the court may declare the agreement void.
Step 4: File a Formal Court Application
If your lawyer believes you have strong grounds, they will file an Application with the Court of King’s Bench to explicitly set aside the Domestic Contract. You will need to provide sworn affidavits, extensive financial documents, and potentially undergo Questioning (Discovery) where lawyers cross-examine both parties under oath regarding the circumstances of the signing.
Common Grounds for Invalidating a Contract
Not every contract can be thrown out just because it is a bad deal. Here are the specific legal grounds that actually work in court:
| Legal Grounds | What it Means for Your Case |
|---|---|
| Duress & Coercion | The contract was signed under intense, unfair emotional or financial pressure, leaving you with no real choice but to comply. |
| Fraud / Hidden Assets | Your spouse deliberately lied about their net worth or income, meaning you signed away rights without knowing the true facts. |
| Unconscionability | The terms are so outrageously unfair that they shock the conscience of the court (e.g., leaving a disabled spouse completely homeless and destitute). |
| Failure to Understand | Due to a severe language barrier or lack of ILA, you genuinely did not understand the legal rights you were permanently waiving. |
How Much Does it Cost to Challenge a Prenup?
Litigation to overturn a legally signed document is notoriously expensive and time-consuming:
- Lawyer Retainers: To take on a complex case to invalidate a contract, a senior family lawyer will generally require an initial retainer of $5,000 CAD to $10,000 CAD.
- Forensic Experts: If you need a forensic accountant to prove your spouse hid assets, expect to pay an additional $3,000 CAD to $8,000 CAD for their specialized reports.
- Total Trial Costs: If the matter goes all the way to a full trial at the Court of King’s Bench, total legal fees can easily exceed $25,000 CAD to $50,000 CAD per person.
How Long Does the Process Take?
Filing the initial application is relatively quick, but proving your case takes significant time. Gathering evidence of fraud or duress, attending mandatory settlement conferences, and scheduling a trial at a busy New Brunswick courthouse can take anywhere from 1 to 3 years.
Frequently Asked Questions (FAQ)
Can I cancel the prenup if I simply changed my mind?
No. “Buyer’s remorse” is not a valid legal reason to overturn a contract. You cannot set aside a Marriage Contract in New Brunswick simply because you realize it was a poor financial decision years later. You must prove a severe legal flaw like fraud or duress.
What happens if the contract is officially thrown out?
If a judge sets aside the Marriage Contract, it is treated as if it never existed. Your property and spousal support rights will then default to the standard rules under the New Brunswick Marital Property Act, usually resulting in a 50/50 split of marital assets.
Can a judge throw out just one part of the contract?
Yes. This is called “severance.” If only one specific clause is illegal or unconscionable (such as an attempt to waive child support), the judge can strike that single sentence out while keeping the rest of the financial agreement legally intact.
Does infidelity invalidate our Marriage Contract?
Generally, no. Canadian divorce law is “no-fault.” Unless your contract specifically contains a highly unusual (and often difficult to enforce) “lifestyle clause” penalizing adultery, an affair will not invalidate the financial terms of your prenuptial agreement.
Leave a Reply