TV Licensing is appealing to hotels and guest houses in Hampshire and Surrey to make sure they are correctly licensed.
Budget hotels, boutique bed and breakfasts, luxury spa resorts and serviced apartments must all be covered by a television licence if guests or staff are watching TV as it is broadcast.
All viewers who use iPlayer to watch BBC programmes must also be covered by a television licence following the introduction of new rules in September.
For many smaller hotels and guest houses, the cost of a TV licence is £145.50 per year, the same amount as a private house.
Hotels with more than 15 rooms are covered by one licence for the first 15 rooms, but will need an extra licence for every five rooms thereafter.
According to the latest industry figures, the UK tourism industry is set to grow further after a bumper year of visits.
In 2015-16, tourism brought in £22billion to the UK economy, with 36.1million overseas visitors to the UK - up five per cent on 2014. In the first half of 2016, south-east England accounted for 2.33million of these visits, a 0.69 per cent increase on 2015.
Ben Craig, TV Licensing’s spokesman for London and south-east England, said: “As these figures show, the UK’s growing tourism business is becoming more competitive, with hoteliers vying to provide ever-greater guest satisfaction.
“Whether hotels are providing extras such as smart TVs or TVs in the bathroom, they all need to be correctly licensed.”