When is an offer actually 'accepted' in Ontario — do I need to be notified?

In Ontario, an offer is generally considered accepted when the seller signs the offer (with no changes) and that acceptance is communicated back to the buyer before the irrevocability deadline. Signing the offer in a drawer without telling the buyer is not enough — acceptance must be communicated.

In practice, the seller's agent typically contacts the buyer's agent by phone or email to confirm acceptance, and the signed copy is delivered. Under the Electronic Commerce Act, Ontario courts have recognized electronic signatures and digital delivery as valid in most real estate contexts, though the specific mechanics can vary.

The moment of communication matters because it determines whether the acceptance was within the irrevocability window. If the deadline has passed even by minutes, and that is disputed, the result can be that no binding contract was formed. Your real estate agent should confirm acceptance explicitly and in writing before you treat the deal as done. A lawyer can advise if there is any dispute about whether and when a valid acceptance occurred.