Yes. A simple template is: “Dear [tenant], following a rent review, the proposed rent is €[amount] per month from [date]. The current rent is €[amount], and the increase of €[amount] has been calculated using the applicable RPZ limit; comparable rents are: [details].” Before sending it, check the current rules and official RTB guidance, as the permitted increase can depend on the tenancy and review date. The notice must meet statutory requirements, give the required notice period and be sent to the RTB on the same day as the tenant; a solicitor can clarify any uncertainty.