The relevance of time in medical delivery makes difficult to include validation systems into the supply chain. On the other hand, the use of reusable containers duty to transport medicines makes RFid an excellent technology to be used in this application. Not only it is a nonintrusive technology but also cheap because of the reuse of UHF passive tags, attached to medicine containers, paying for itself in the long run. This project explains the development of a system that uses RFid technology to pursue these purposes, not directly interfering with carriers work.