Yes.
As soon as the posting undertaking has made the posting declaration to the ITM via the electronic platform designed for that purpose (https://edetach.itm.lu/edetach/) with a view to enabling it to provide services on Luxembourg territory, the posting undertaking must print a social badge for each of its posted workers, who must present the badge on request in the event of an inspection by the ITM.
The social badge simplifies the monitoring of compliance with the provisions on the posting of workers.