The Corporate Telephone Preference Service
The Corporate Telephone Preference Service (CTPS) is a free service enabling businesses to register their wish not to receive unsolicited sales and marketing telephone calls.
Those that can register on the CTPS include limited companies and plc's. Sole traders and partnerships register on the TPS and not the CTPS, something that often confusing businesses wishing to screen data.
Organisations with which you have an ongoing relationship, for example those who regard you as a customer, (or in the case of charities - a donor) may well gather your consent during the early stages of your relationship with them and will therefore be entitled to call you even if your number is registered on CTPS (unless you have previously told them specifically that you object to them calling you for marketing purposes).
The CTPS can accept the registration of mobile telephone numbers, however it is important to note that this will prevent the receipt of marketing voice calls but not SMS (text) messages. If you wish to stop receiving SMS marketing messages, please send an 'opt-out' request to the company involved.
As CTPS registration only prevents marketing calls, organisations will still be able to call you for the purposes of genuine market research.
Unlike the TPS, businesses are required to renew their registration annually so if you do register, make sure you provide a current email address as the renewal advices are sent by email and not post.