From 1st April 2005, your local authority must be notified when you have a new or replacement boiler fitted. Your installer should do this for you and issue you with one of the following certificates: 'Exceptional circumstances' form If your installer tells you it is too difficult or expensive to install a high-efficiency condensing boiler in your home, they should give you a copy of the 'exceptional circumstances' form for you to keep. Completion certificates If your boiler is installed by a Gas Safe Register/CORGI-registered or OFTEC-registered installer, you will get a 'building regulations compliance' certificate from Gas Safe Register/CORGI or OFTEC after the work has been completed. Gas Safe Register/CORGI or OFTEC will also tell the local authority that you have had a new or replacement boiler fitted. You should keep these certificates as you may need them when you sell your home.