A perennial hot topic among data privacy issues is the trade in addresses and personal data for marketing purposes. The fact that this trade is flourishing is shown by the volume of unsolicited advertising mailings and calls, which can become a nuisance for many citizens. Although the Data Protection Act does not prohibit address trading, it does set limits to it and gives those affected certain rights.
Source: FDPIC – “Spam” in the mailbox or: the nuisance of address trading