The inner envelope must bear, in addition to the name of the department to which it is addressed, as indicated in the invitation to tender, the words ‘Invitation to tender — Not to be opened by the mail service’. If self-adhesive envelopes are used, they must be sealed with adhesive tape and the sender must sign across that tape.
Les deux enveloppes seront fermées, l’enveloppe intérieure portant, en plus de l’indication du service destinataire, comme indiqué dans l’appel d’offres, la mention appel d’offres — à ne pas ouvrir par le service du courrier.