The Telephone Preference Service (TPS) is the UK’s opt-out register for people who do not want unsolicited live sales calls. Organizations making marketing calls must screen relevant numbers against the register and respect applicable rules and exceptions.
In practice, a business or its call-handling provider should check and regularly update contact lists against the TPS, then apply the results as a suppression control before dialing. Poorly synchronized lists or processes can lead to calls reaching registered numbers and create regulatory risk, especially at high volumes. TPS screening is a marketing-compliance measure, not a cybersecurity defense against intrusion, but it depends on reliable data handling, clear responsibility, and auditable records.