Ofcom has fined broadband provider Prodigy £30,000 for failing to comply with requirements to provide information on how it allows customers to switch broadband provider.
The fine comes after the industry regulator received complaints about broadband providers not complying with rules governing changing broadband providers.
Ensuring that consumers can move broadband providers quickly, easily and with minimal service disruption is a priority for Ofcom.
"Ofcom considers that Prodigy has failed to provide all the required information. Given Prodigy's ongoing failure to comply with the Section 135 notice, and having followed the procedures set out in the Communications Act, Ofcom has decided to impose a penalty of £30,000 on Prodigy," said Ofcom.
Prodigy was fined due to continued non-compliance and the investigation is continuing, said Ofcom.
Since laws were introduced last year to make it easier to switch provider, Ofcom has seen a decline in complaints, which suggests providers are complying with them.
The UK retail broadband market is performing well, with competition between a range of providers giving consumers choice, said Ofcom.
Broadband is available to 99.6% of UK households, and more than 80% can choose between two or more wholesale providers. Ofcom said 65% of homes have the choice of four or more providers, and many can choose from eight providers.