A time and/or attendance recording device for recording the time and/or attendance of persons , wherein the time and/or attendance recording device has a local memory or is connected to a local memory , wherein the time and/or attendance recording device has a communication interface for communication with a server system , wherein personal data can be stored in the local memory , wherein the time and/or attendance recording device is configured in such manner that personal data is stored in the local memory depending on to which group of people from a plurality of groups of people a person is assigned, wherein the plurality of groups of people comprises at least a first group of people, wherein the plurality of groups of people comprises a second group of people, wherein personal data relating to persons , who are assigned to the first group of people, is stored in the local memory , wherein the personal data relating to persons , who are assigned to the second group of people, is not stored in the local memory , wherein the time and/or attendance recording device is configured in such manner that a person : - depending on a number of user interactions of this person with the time and/or attendance recording device ; and/or - depending on a number of user interactions of this person with one or a plurality of additional time and/or attendance recording devices which are assigned to the same building and/or area as the time and/or attendance recording device , is assigned to another group of people from the plurality of groups of people, wherein the other group of people is the first group of people or the second group of people. wherein the time and/or attendance recording device has a local memory or is connected to a local memory , wherein the time and/or attendance recording device has a communication interface for communication with a server system , wherein personal data can be stored in the local memory , wherein the time and/or attendance recording device is configured in such manner that personal data is stored in the local memory depending on to which group of people from a plurality of groups of people a person is assigned, wherein the plurality of groups of people comprises at least a first group of people, wherein the plurality of groups of people comprises a second group of people, wherein personal data relating to persons , who are assigned to the first group of people, is stored in the local memory , wherein the personal data relating to persons , who are assigned to the second group of people, is not stored in the local memory , wherein the time and/or attendance recording device is configured in such manner that a person : - depending on a number of user interactions of this person with the time and/or attendance recording device ; and/or - depending on a number of user interactions of this person with one or a plurality of additional time and/or attendance recording devices which are assigned to the same building and/or area as the time and/or attendance recording device , - depending on a number of user interactions of this person with the time and/or attendance recording device ; and/or - depending on a number of user interactions of this person with one or a plurality of additional time and/or attendance recording devices which are assigned to the same building and/or area as the time and/or attendance recording device , is assigned to another group of people from the plurality of groups of people, wherein the other group of people is the first group of people or the second group of people. <EOS>