An intra-corporate transfer is a temporary posting of a third-country national, for the purpose of working or training, for a period of more than 90 days from an undertaking or group of undertakings established in a third country to an entity belonging to that undertaking or to the same group of undertakings established in the EU.  It also comprises the mobility of the third-country national between companies of the same group established in one or more EU Member States.