Employers liability insurance customers should make sure that any gas fitters working for them are fully registered, after Trading Standards has issued a warning about rogue tradesmen.
The organisation has urged homeowners to be more alert when looking for someone to carry out gas work on their property, which can range from fixing a boiler to installing a new cooker.
Trading Standards officers are warning employers liability insurance customers that gas and rogue fitters are a potentially lethal combination.
Brian Wilson, an officer for the Stirling and Clackmannanshire Councils Joint Trading Standards Service, said: "We'd urge anyone who needs gas work done in their home to not only make sure the trader carries a Gas Safe card, but that they check the back of the card where it states what appliances the gas engineer is qualified to work on."
He added that employers liability insurance customers also need to make sure gas fitters can provide an address to verify their place on the Gas Safe register.
Last month Gas Safe research estimated that 100,000 gas cookers an hobs are fitted illegally each year, by unregistered fitters.