Method for providing an access device for a personal data source of a person , in which by an observation device, - by means of a detection device a location of the person within a coverage area of the detection device is automatically detected and the person is automatically identified; - by means of a display device connected via a data connection with the observation device, on a display surface visible to the person at the location , a personalised symbol assigned to the person on the basis of their identity is represented to the person ; and - when the symbol is represented, in reaction to an operating action of the person data are retrieved from the personal data source assigned to the person on the basis of their identity and are represented on the display surface , characterised in that - at the latest when the detection device detects that the person leaves the coverage area, the representation of the symbol assigned to said person and of the retrieved data on the display surface is stopped - the observation device comprises a server device operated in the Internet, which is connected via a respective data connection with a multiplicity of display devices , and which is configured to track the respective location of the identified person and to assign to the person the personalised symbol in a permanent manner such that it follows the person when the location of the person changes, to which end the display device and/or the display surface for the representation of the symbol is selected respectively depending on the detected actual location of the person , wherein - the observation device ensures that the data are at each point in time represented only at one single location. - by means of a detection device a location of the person within a coverage area of the detection device is automatically detected and the person is automatically identified; - by means of a display device connected via a data connection with the observation device, on a display surface visible to the person at the location , a personalised symbol assigned to the person on the basis of their identity is represented to the person ; and - when the symbol is represented, in reaction to an operating action of the person data are retrieved from the personal data source assigned to the person on the basis of their identity and are represented on the display surface , characterised in that - at the latest when the detection device detects that the person leaves the coverage area, the representation of the symbol assigned to said person and of the retrieved data on the display surface is stopped - the observation device comprises a server device operated in the Internet, which is connected via a respective data connection with a multiplicity of display devices , and which is configured to track the respective location of the identified person and to assign to the person the personalised symbol in a permanent manner such that it follows the person when the location of the person changes, to which end the display device and/or the display surface for the representation of the symbol is selected respectively depending on the detected actual location of the person , wherein - the observation device ensures that the data are at each point in time represented only at one single location. <EOS>