Broadband provider Virgin Media has increased the security around its TV service in order to stop people from using illegitimate technology to access channels.
The company has launched encryption technology across Croydon in an effort to ensure that everyone who receives its content is paying for it, reports the Surrey Comet.
Subscribers to the company's broadband TV deals are now being sent new TV smart cards that will allow them to continue enjoying programming while the security system comes into force.
Malcolm Davies, Head of Fraud and Security at Virgin Media, told the newspaper that people considering "dodgy" cable boxes should think again.
He added: "The new encryption we're introducing across Croydon this month will protect our existing customers and make it impossible for anyone else to get our services unless they pay for them legitimately."
Virgin Media recently launched a campaign designed to encourage its broadband users to improve their knowledge of malware and other online security threats.