Prohibited and restricted articles
According to the UPU's rules and regulations, certain items are either prohibited or restricted within the international mail flow. With the cooperation of its member countries, the UPU regularly updates its CDS country-specific list of prohibitions and restrictions.
The UPU also provides information about items that are not admitted in any country (Article 18 of the UPU Convention). Finally, historical information can be found in the 2007 List of Prohibited Articles page.