Corporate Telephone Preference Service

On 25 June 2004 the Corporate Telephone Preference Service (CTPS) was introduced. From this date any UK business is able to write to the Telephone Preference Service and register its telephone numbers on the 'do not call' list. It is an offence to make sales calls to any of these numbers from 28 days after the company has registered them. The maximum fine for making a sales call to these numbers is £5000.

All telephone numbers available from Electric Marketing are cleaned against the CTPS file. If a telephone number on the Electric Marketing database is registered with the CTPS the letters CTPS are shown before the telephone number.

For example: CTPS 020 7981 3000. 

We have left the telephone numbers on the database because, while cold-calling these numbers is not allowed, it is still permitted to call them for other reasons including for research purposes or to check information.

We send a regular email to our clients informing them which companies on our database have registered with the CTPS so that they can ensure that they don't phone them.

We also offer a free CTPS Checker service where you can check that a number is not registered with the CTPS before phoning it.


You can upload and screen telephone numbers on your prospect database against the CTPS file using our CTPS Screening Service.