Fans buying tickets on auction websites for the World Cup are paying huge mark-ups and risk getting turned away at the turnstiles, a report has warned.
Fans are being warned not to buy tickets from touts
Tickets for the football tournament sold via unauthorised websites are, on average, 327% more expensive than their face value, security firm G4S found.
Two tickets for the England v Trinidad & Tobago fixture sold online for £1,500 - 2,307% over the original sale price.
Security checks could mean fans with such tickets are barred from matches.
"Fifa has implemented a rigorous identification system for the World Cup finals, so supporters purchasing tickets from touts could face severe disappointment," said Douglas Greenwell from G4S.
"If the ticket holder's details do not match those of the purchaser they will be refused entry to the stadium."
Tickets are issued in the name of the applicant or guest specified in the original order and an ID or passport number is required.
According to the terms and conditions of sale, tickets can only be transferred by an application to the Fifa World Cup organising committee.
Thousands of tickets are being sold illegally by online auction sites and tickets touts despite the fact the UK government has banned the unlicensed sale of tickets for the finals, G4S added.