TV Licensing officials launched a crackdown on pubs showing World Cup matches without a valid licence last week.
The initiative will involve a "World Cup Squad" of licensing officers visiting some of the 37,000 pubs that are expected to screen the matches this week.
Licensees without a valid TV licence caught showing the games, which are being screened on terrestrial TV, could face a £1,000 fine, and be forced to pay £40 in court costs as well as the fee for a new licence.
For the same amount, football fans could buy a return ticket to Japan and South Korea to watch the tournament live.
The initiative follows the launch of the TV Licensing Business Task Force aimed specifically at businesses providing TVs for staff or customers at work.
Mark Aulsebrook, head of field operations for TV Licensing, said:
"This World Cup is promising to be the biggest TV viewing event for years. We're not spoilsports, we want everyone to enjoy the games but we have absolutely no qualms about spoiling TV licence-evaders' fun - why should they get to watch the tournament without a TV licence, when the honest majority of fans have to pay for theirs?"
To get a licence call 0870 241 5590.