Only I Made Financial Disclosure for Our Separation Agreement — My Spouse Didn't. Can He Later Say the Agreement Is Invalid? Chinese-Speaking Toronto Divorce Lawyer Miao He

No — he can’t use his own failure to disclose as a reason to set the agreement aside. Disclosure guards against one specific attack, the “no disclosure” attack: if neither side disclosed, either side may use it; if you disclosed and he didn’t, that argument is closed to him. But that doesn’t mean the agreement can’t be attacked at all — being rushed into signing, or having no lawyer of his own, can still be grounds to set it aside. Disclosure blocks only the disclosure ground.

A client came to consult me. She and her spouse had already agreed on how to divide their property and were ready to sign a separation agreement. She was willing to list all of her property in full disclosure. He was living abroad and didn’t want the trouble of making disclosure himself. Her worry: if I’m the only one who disclosed, can he later change his mind and attack the agreement for lack of disclosure?

The short answer: he can’t use his own non-disclosure to overturn the agreement.

1. The “No Disclosure” Ground Is About What Was Hidden From You — Not What You Hid Yourself

One of the grounds on which a court can set aside a separation agreement is that, at the time of signing, one side failed to disclose significant assets or debts. The logic is this: you hid your property, I signed without knowing your true financial picture, I was the one prejudiced, so I can attack the agreement on that ground. His situation is the opposite — not disclosing was his own choice. For him to later say “the agreement is invalid because I didn’t disclose” would be using his own conduct as a weapon against his own signature, and the court won’t accept that. The party who didn’t disclose is precisely the party who can least use the disclosure ground.

2. Neither Side Disclosing Is Different From Only One Side Disclosing

If neither side made disclosure when the agreement was signed, the agreement stands on weak ground: whichever side later regrets it may use “no disclosure” to apply to have the agreement set aside and the property divided afresh. But when one side has made full disclosure and the other hasn’t, the disclosing side stands firm — he can’t say he didn’t know your financial position. Your property was laid out in front of him, and he signed with his eyes open.

3. Disclosure Blocks Only the Disclosure Ground — the Other Grounds Are Still There

Whether an agreement can be set aside doesn’t turn on disclosure alone. Being pressured or rushed into signing, so that the signing wasn’t fully voluntary, can still be a ground. Having no lawyer of his own — nobody to explain what the agreement means and what consequences signing it carries — can still be a ground. So the sound approach does both: you make full disclosure, and he has his own lawyer, who explains the agreement to him so that he signs understanding it. Block the disclosure ground and the no-lawyer ground, and the agreement genuinely stands.

So if you’re the only one who disclosed, you don’t need to worry much about him using “no disclosure” to overturn the agreement later — that is the one argument closed to him. Watch the other two things instead: that he signs voluntarily, and that he has his own lawyer. Cover all three, and the agreement is very hard to overturn.

FAQs

1. My spouse refuses to make disclosure. Does that mean I can’t sign the agreement?

No. You can sign — just make your own disclosure complete. By not disclosing, he gives up his own protection: if he later tries to attack the agreement for “no disclosure,” he can’t overturn yours that way. The risk of not disclosing sits with him, not with you.

2. We both signed without any disclosure. Is the agreement automatically invalid?

No. The agreement is treated as valid unless and until one side applies to court and the court sets it aside. But when neither side disclosed, both sides are left holding a weapon that can be used against the agreement — it can be challenged at any time. If you’ve already signed that way, consider making disclosure now and signing a fresh agreement to repair the foundation.

3. My spouse lives abroad. How do signing and getting a lawyer work?

Living abroad doesn’t prevent him from signing a separation agreement. He can sign where he is, and a lawyer can explain the agreement to him by video and give him independent legal advice that way. What matters isn’t where he is — it’s that the steps are completed: his own lawyer, the agreement explained to him, and his voluntary signature.

This article is general legal information, not legal advice, and does not create a lawyer-client relationship.