Communications regulator Ofcom will clamp down on fixed-line telephone providers that switch users without their consent.
Under a new set of proposals, which look set to come into force in September, any telephone operator found guilty of 'slamming' tactics - including the forging of signatures on customer agreements and claiming to represent rival companies - will be liable for a fine of up to 10 percent of their total turnover. Ofcom described slamming tactics as an "extreme form of mis-selling".
The new proposals will require telecom companies to keep records of telephone conversations with customers as well as agree to not 'engage in dishonest, misleading, or deceptive conduct'.
"Ofcom wants to stamp out mis-selling in the telecoms market so that consumers can get the best that competition brings. Our announcements are designed to tackle misleading sales practices in landline and mobile services," said chief executive Ofcom.