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Independent Legal Advice for a Separation Agreement in Ontario

Do you need your own lawyer to sign a separation agreement in Ontario? Learn what independent legal advice is, how certificates work and why it matters.

Family Law4 min readTSLBy the Treadstone Law Team · OntarioUpdated October 28, 2026
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Key takeaways
  • Ontario's guidance says each party should get independent legal advice before signing a separation agreement.
  • A court may refuse to enforce a separation agreement if a party did not fully disclose financial information.
  • For family arbitration agreements a certificate of independent legal advice is required, but the Family Law Act has no equivalent mandatory certificate for separation agreements.
  • A separation agreement cannot easily be changed later, so the time to ask questions is before you sign.

Your spouse or former partner has handed you a separation agreement and asked you to sign. Maybe they say a lawyer already drafted it and it is just paperwork. You may be wondering whether you really need your own lawyer, and what a certificate has to do with it.

This article explains independent legal advice, often called ILA, in plain language. It is general information, not legal advice about your situation.

What independent legal advice means

Independent legal advice means you meet with a lawyer who acts only for you, not for your spouse, and who explains what the agreement says, what rights you may be giving up and what your options are.

Ontario says plainly: you should each have your own lawyer look over your separation agreement before you sign it. Ontario's court guidance likewise says each party should get independent legal advice before signing.

Is it required?

For separation agreements, the Family Law Act has no mandatory certificate of independent legal advice. So a missing certificate does not by itself decide the matter. But the guidance still tells both people to get advice, and there are practical reasons for that, covered below.

Family arbitration is different. For family arbitration agreements, Ontario requires the lawyer giving independent legal advice to complete a certificate, and the certificate must be attached to the arbitration agreement if the matter goes to court.

Type of agreementCertificate of independent legal advice
Separation agreementNo mandatory certificate under the Family Law Act, but each party should get advice
Family arbitration agreementCertificate required, and attached if the matter goes to court
Mediated agreementMediator does not replace a lawyer; get advice from different lawyers before signing

What an ILA certificate is and how it works

The Law Society of Ontario's guidance says a lawyer giving independent legal advice should give the client a written certificate, have the client sign a copy, and send the signed copy to the other side's lawyer. In plain terms, the certificate is a record that you got advice from your own lawyer before signing.

How much a certificate matters if the agreement is later challenged depends on the facts, so it is worth confirming with a lawyer.

Why advice protects the agreement, and you

A court may refuse to enforce a separation agreement if a party did not fully disclose financial information. A court may also set aside an agreement, or part of it, if a party failed to disclose significant assets, debts or liabilities that existed when it was made, or did not understand its nature or consequences. Advice from a lawyer helps surface both problems before signing.

Agreements also have to meet formal requirements. A domestic contract, including a separation agreement, is unenforceable unless it is in writing, signed by the parties and witnessed. A lawyer can make sure those steps are done correctly.

Finally, you cannot easily change a separation agreement later. That is why advice before signing is so much more valuable than regret afterward.

Questions to raise with your lawyer

What to do next

If cost is a concern, Family Law Information Centres provide free information, but their staff do not give legal advice, and duty counsel can explain the law but cannot represent you in your court case.

Frequently asked questions

Do I legally have to get a lawyer before signing a separation agreement?

Ontario's guidance says each party should get independent legal advice before signing. Whether advice is a strict requirement for your particular agreement depends on your situation, so it is worth confirming with a lawyer.

Can we use the same lawyer?

Independent advice means a lawyer acting for you alone. Ontario says you should each have your own lawyer review the agreement.

What does the lawyer give me after the advice?

The Law Society of Ontario's guidance says the lawyer should give you a written certificate, have you sign a copy, and send the signed copy to the other side's lawyer.

I used a mediator. Do I still need a lawyer?

Ontario says a mediator does not replace a lawyer and advises getting advice from different lawyers before signing a mediated agreement.

This article is general information, not legal advice. Reading it does not create a lawyer-client relationship. Ontario laws, tax rates, and government programs change, and how the law applies depends on your specific facts. For advice about your situation, speak with a licensed Ontario lawyer. Treadstone Law is licensed by the Law Society of Ontario — reach us at 1-844-900-1070 or start a file online.

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