Using the Postcode/Address Finder
Why do I have to type in a special code?
Postcode and address information is a valuable asset both to Royal Mail and other businesses. Many businesses use postcode address information on mailings, to update their own databases, or to provide services to other businesses such as internet applications or data cleansing.
The code you type is part of something called a Turing Test. It is used to prevent automated systems from unlawfully exploiting the information (for example by collecting hundreds of postcodes or addresses in one go).
Alan Turing was a pioneer of computer science. He defined a test in which a computer and a person would be asked the same questions to see if human and artificial intelligence could be distinguished. In this instance they can: the code you are asked to enter is presented in a way that is unreadable by a computer.