The employment relationship of a worker habitually working in Luxembourg, who is temporarily posted aboard is governed by Luxembourg law.
Nevertheless, it is necessary to consult the law of the country to which he/she is posted in order to determine which foreign rules are applicable.
It should be remembered that rules on the temporary posting of workers are partially harmonised at European level; the principle is that the contract of employment continues to be governed by the law of the State in which the worker habitually works but that certain rules of the State to which he/she is posted must apply.
It should also be noted that any employer which intends to temporarily post a worker abroad for professional reasons will have to inform the Joint Social Security Centre (Centre commun de la sécurité sociale - CCSS) of its intention in advance by filling in an application for proof of insurance in the event of work abroad (demande d’attestation en cas de travail à l’étranger) on the website of the CCSS.