you can use the attached link to obtain a copy through Gas Safe
https://www.gassaferegister.co.uk/notifications/search-for-a-notification/
Selling your home? Lost your Boiler Completion Certificate
never fear - click the link to take you to the Gas safe Register and order a replacement online
It is always best to ensure a CORGI Registered Gas Fitter install a boiler and issue a Registration certificate otherwise this causes issues when you sell:
example:
https://www.mybuilder.com/questions/v/7837/selling-house,-boiler-has-no-gas-safety-register-certificate-please-help
