Is a Verbal Agreement Legally Binding in Canada?

What makes a spoken agreement legally binding

A verbal agreement (an oral contract, made by speaking rather than writing anything down) can be just as enforceable as a written one under Canadian law. The Government of Canada’s consumer protection guidance confirms that “a contract is a written or spoken agreement between two or more parties intended to be enforceable by law.” Nothing about being spoken instead of written disqualifies it.

What actually matters is intention. The Supreme Court of Canada held in Hawrish v. Bank of Montreal that for any agreement, oral or written, to be enforceable “there must be a clear intention to create a binding agreement.” Courts look at what was said and the circumstances around it, not the format.

The same case also confirms that an oral side agreement can stand alongside a written one. A “distinct collateral agreement, whether oral or in writing… is valid and enforceable even though the main agreement be in writing,” as long as the oral terms don’t contradict the written ones. So a separate verbal promise made around the time of signing a written contract isn’t automatically wiped out just because the main deal was written down.

This is a federal principle from a Supreme Court of Canada decision, so it applies the same way in Ontario, Alberta, and every other province.

When the law requires writing instead

Both Ontario and Alberta carve exceptions into this general rule, and they don’t carve them the same way.

Guarantees. A guarantee is a promise to answer for someone else’s debt if they default, for example telling a lender “if my brother doesn’t pay, I will.” In Ontario, the Statute of Frauds says no such promise “shall be deemed invalid” unless it is “in writing and signed by the party to be charged.” A purely verbal guarantee in Ontario is not enforceable against the guarantor.

Alberta goes further. It’s not enough for an Alberta guarantee to be written down: the Guarantees Acknowledgment Act requires a lawyer’s certificate, confirming the guarantor understood what they were signing, to be attached to the guarantee document before it takes effect. According to the Government of Alberta’s summary of the Act, its purpose “is to prevent fraud and is designed to protect an ordinary individual who, through lack of experience or understanding, might find himself subject to liabilities” they didn’t fully grasp. A signed-but-uncertified guarantee in Alberta can still fail.

Interests in land. In Ontario, the Statute of Frauds also blocks verbal land dealings: “no lease, estate or interest… shall be assigned, granted or surrendered unless it be by deed or note in writing signed by the party,” with one carve-out for short leases of three years or less made at close to full rental value. Longer leases, sales of land, and most other interests in land need writing.

The current Alberta rule on verbal land agreements specifically was not confirmed against a primary source for this article, so no Alberta position is stated here; readers dealing with a verbal land transaction in Alberta should check the current statute rather than assume Ontario’s rule carries over.

The part performance exception for land deals

Even in Ontario, an unwritten land agreement isn’t automatically dead. The Ontario Court of Appeal, in 2730453 Ontario Inc. v. 2380673 Ontario Inc., confirmed that “the requirement that a contract for the sale of land be in writing will yield in the face of part performance: the part performance fulfills the very purpose of the written contract.” In plain terms: if one side has already acted on the oral deal in a way that makes the deal obvious (moving in, making payments, building on the land), a court can still enforce it despite the missing paperwork. Whether particular conduct counts is decided case by case.

A worked example

Anita in Ontario verbally tells a bank she’ll guarantee her nephew’s $10,000 business loan if he defaults. Nothing is signed. Because the Statute of Frauds requires a guarantee to be “in writing and signed by the party to be charged,” the bank cannot enforce Anita’s promise against her.

Contrast that with Priya in Alberta, who does sign a written guarantee for a friend’s loan. Under the Guarantees Acknowledgment Act, her signature alone still isn’t enough: without a lawyer’s certificate attached confirming she understood it, the lender may not be able to enforce the guarantee against her either.

Common mistakes

• Assuming a spoken deal isn’t a “real” contract. Federal contract principles recognize spoken agreements as enforceable, provided there was clear intent to be bound; the format isn’t what makes a contract real.
• Treating a handshake guarantee as binding in Ontario. The Statute of Frauds specifically voids unwritten guarantees, so a verbal promise to cover someone else’s debt gives the lender nothing to enforce.
• Assuming a written guarantee is automatically enough in Alberta. The Guarantees Acknowledgment Act adds a lawyer’s certificate requirement on top of writing; skipping that step can leave even a signed guarantee unenforceable.
• Giving up on an oral land agreement because nothing was written down. In Ontario, the part performance doctrine can still rescue such an agreement where one side has already acted on it, so the writing requirement isn’t always the last word.
• Assuming Ontario’s land-writing rules apply the same way in Alberta. The two provinces’ statutory schemes are not identical, and Alberta’s current rule on this point should be checked directly rather than assumed.