Data brokers are organisations that obtain data from a variety of sources and then sell or license it to third parties. Many trade in personal data, which is purchased by their customers for several purposes, most commonly to support marketing campaigns. The UK data protection regulator has for some time been actively enforcing against organisations who buy individuals’ personal data for direct marketing purposes without first conducting appropriate due diligence to ensure that those individuals have adequately consented to receiving marketing communications. However, in a recently issued monetary penalty notice, the ICO indicated that it may be shifting its enforcement strategy. This post discusses the latest developments.