French Goverment forbid to sent Gold & Silver by ordinary mail

From an order from May 23th, 2013 (Décret n ° 2013-417 du 21 mai 2013)the department MINISTÈRE DU REDRESSEMENT PRODUCTIF (="Department to increase business productivity") http://legifrance.gouv.fr/affichCodeArticle.do;jsessionid=650CB52F4C5158577167EC3474B24EA9.tpdjo09v_3?cidTexte=LEGITEXT000006070987&idArticle=LEGIARTI000027438932&dateTexte=20130624&categorieLien=id#LEGIARTI000027438932 You will find the following wording: "The insertion of banknotes, coins and precious metals is prohibited in mailings, including the insured items, registered items and items subject to formalities certifying deposition and distribution." I found the link on a french Goldcoin webpage: http://en.numista.com/forum/topic19577.mobile.html There is also a interesting discusion, why the govermnebt forbids it. (You have to translate the page from french to english)