A landlord must serve a valid rent review notice, stating the new rent, the date it takes effect and how the amount was calculated. Depending on the tenancy and rules applying at the time, this may include evidence such as comparable rents from the RTB Rent Register and information showing compliance with the applicable rent-increase limit. The notice must also be sent to the RTB within the required timeframe, generally on the same day as it is given to you. If you believe the notice or evidence is inadequate, you can seek information from the RTB; the outcome of any dispute is decided on the individual facts.