21Moreover, it follows from the spirit and purpose of the Regulation that it is intended to ensure that judicial documents are served effectively, while respecting the legitimate interests of the persons on whom they are served. Although all the methods of service provided for by the Regulation can ensure, as a rule, that those interests are respected, it must be conceivable, in view of that purpose, to use one or other, or indeed two or more at once of those methods of service which appear the most suitable or appropriate in light of the circumstances of the case.