An RTB determination order is legally binding, but it does not enforce itself. If a tenant does not comply, the landlord can ask the RTB about enforcement or apply to the appropriate court for an enforcement order, depending on the order and circumstances. A landlord should keep the determination order and records of non-compliance, such as unpaid amounts or correspondence. Enforcement does not guarantee a particular outcome, so consider getting advice from a solicitor and check the current guidance on the RTB or Courts Service websites.