14 May 1979. After the Russian-Turkish War (1877-1879), the Temporary Russian Governance hands over to Bulgarian authorities all postal and telegraph offices with their equipment and facilities. 1 July 1979. Bulgaria becomes a member of the Universal Postal Union. The start of official international contacts of Bulgarian posts is on 9 October 1880. 31 March 1997. Bulgarian Posts Ltd. is transformed into a joint-stock company with a state-owned share in the capital over 50 percent. 2005. By an amendment of the Privatization and Postprivatization Control Act, Bulgarian Posts PLC is included in the list of companies with more than 50 percent state share in capital prohibited for privatization. In the recent years. Bulgarian Posts PLC is a promisingly developing profitable company and the principal postal operator on the Bulgarian market.