A specific category of data intermediation services includes providers of services that offer their services to data subjects. Such data intermediation services providers seek to enhance the agency of data subjects, and in particular individuals’ control over data relating to them. Such providers would assist individuals in exercising their rights under Regulation (EU) 2016/679, in particular giving and withdrawing their consent to data processing, the right of access to their own data, the right to the rectification of inaccurate personal data, the right of erasure or right ‘to be forgotten’, the right to restrict processing and the right to data portability, which allows data subjects to move their personal data from one data controller to the other. In that context, it is important that the business model of such providers ensures that there are no misaligned incentives that encourage individuals to use such services to make more data relating to them available for processing than would be in their interest. This could include advising individuals on the possible uses of their data and making due diligence checks on data users before allowing them to contact data subjects, in order to avoid fraudulent practices. In certain situations, it could be desirable to collate actual data within a personal data space so that processing can happen within that space without personal data being transmitted to third parties in order to maximise the protection of personal data and privacy. Such personal data spaces could contain static personal data such as name, address or date of birth as well as dynamic data that an individual generates through, for example, the use of an online service or an object connected to the Internet of Things. They could also be used to store verified identity information such as passport numbers or social security information, as well as credentials such as driving licences, diplomas or bank account information.