This decision tree provides a logical process for determining whether you can engage in postal direct marketing and, if so, to whom. For other types of marketing, see: Direct marketing decision tree—email and other electronic mail marketing—data protection and Direct marketing decision tree—live telephone calls—data protection. Direct marketing means the communication (by whatever means) of advertising or marketing material which is directed to particular individuals. Note 1—personal data and corporate targets Postal marketing to named individuals identified from your customer database will involve processing personal data. The definition of personal data is sufficiently wide to cover business-to-business marketing activities, in particular postal marketing to named individuals in their work capacity: ‘Personal data means any information relating to an identified or identifiable natural person. An identifiable natural person is one who can be identified, directly or indirectly, in particular by reference to an identifier such as a name, an identification number, location data, an online identifier or to one or more factors specific to the physical, physiological, genetic, mental, economic, cultural or social identity of that natural