In principle it should be noted that there is an increased trend of dealing with more data which refer to foreign issues. This makes the control more difficult and the situation will very soon become non-transparent to a great extent for the parties involved. Seeming advantages, such as no or little tax or social insurance contributions prove to be serious disadvantages when considered more closely, because it is about the access to health/unemployment insurance and pension system. Information campaigns targeted at the parties involved could be useful here, but are definitely not sufficient.<br />