Tourism chiefs say hotels and holidayparks in Cornwall should ban people visiting if they live in a Tier Three very-high Covid alert area.
Currently just Liverpool is in Tier Three, but it is believed Greater Manchester and Lancashire will soon be added.
Wales has already banned visitors from any high-risk area.
Cornwall's tourism boss, Malcolm Bell, says accommodation providers should cancel any existing bookings from people from very high risk areas, and decline new bookings, reports CornwallLive.
"I realise people’s concerns and the government have made it clear that the advice is not to travel out of a very high zones and that includes for holidays/breaks," said Mr Bell, chief executive of Visit Cornwall.
"Visit Cornwall are building a spreadsheet of postcodes in the very high risk areas to help accommodation businesses to be able to contact customers to cancel their holidays or rebook for next year.
"The problem with the proposal to ban people is how do you stop them? We cannot have police road blocks and even if we did - how do you really know where someone has come from if they hire a car outside the zones, etc?
"That is why we are helping all accommodation providers with the details of the zones and informing them that they must decline booking and contact customers from these areas."
