Yes. A landlord must give written notice of a rent review, rather than relying on a verbal conversation, and the notice should state the new rent and the date it will apply. The notice generally must be served on you and the RTB at least 90 days before the increase takes effect, with the required supporting information. If the notice is missing details or the correct notice period was not followed, you can ask the RTB about dispute resolution; the outcome depends on the facts of the tenancy.