BARS in a popular holiday hotspot have been shut down for reselling the dregs of unfinished drinks to unsuspecting tourists.

       Seven venues in Kavos, Corfu, were rumbled in a three-day raid by local authorities last week for tampering with alcohol.

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       Bartenders decanted dregs of unfinished drinks into barrels and served them to unsuspecting customers as shots Credit: Getty

       Bar staff allegedly poured the dregs of customers' drinks into barrels so they could be served again as shots, local news outlets report.

       The businesses were slapped with fines and ordered to close for 48 hours as a result of the investigation.

       The operation, which ran from Wednesday to Friday, also found seven popular haunts did not have lot number markings on their drink supplies.

       Lot markings are identification numbers typically found on the packaging from a manufacturer which can be used to keep track of stock.

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       This likely means the drinks were tampered with in some way before being sold to holidaymakers.

       Samples from the popular party spots were also sent to the country's State General Chemistry for testing to see if the alcohol was "clean".

       The Greece Independent Public Revenue Authority AADE also suspected the businesses of tax evasion and smuggling as well as tampering with the drinks they served.

       Kavos has long been a favourite destination for tourists, especially for young Brits who make up the greatest number of visitors the Greek island draws each year.

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       Shockingly, "no checks" of a similar kind had been carried out there for years, according to local reports.

       It comes after a British policewoman died in a fall on the same holiday island.

       PC Hannah Emily Byrne, 22, was found dead with a head injury on the first day of her holiday in the Greek resort.

       Cops believe she may have been plied with toxic alcohol laced with methanol.

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       Kavos is a popular holiday spot for young Brits Credit: Brad Wakefield - The Sun