The GHIC (Global Health Insurance Card) was introduced to replace the EHIC after Brexit.
It is free and British tourists do not have to pay for one. Scammers have also been charging British tourists (£75) for passenger locator forms.
The compulsory forms are available on the UK Government website for free but some scam websites appeared higher in Google results than the official website.
Rory Boland, editor of Which? Travel said: “Criminals are exploiting the pandemic and the demand for holidays in a wide range of ways, laying new traps to trick unsuspecting travellers out of their money.