The supervision of the postal service within the Grand Duchy of Greifenberg is regulated by the Greifenberg National Post Office (GreifenbergPost). It is also responsible for the production and sale of postage stamps which are produced by the Greifenberg State Printing House (Greifenbergische Staatsdruckerei).
The Greifenberg Philatelic Office (GPO) represents GreifenbergPost in the international philatelic community. The GPO limits the number of special issues to no more than ten (10) issues per year. However, it is possible that special circumstances, additional commemorative issues will be authorized beyond the normal annual issuances. In addition, cancelled-to-order stamps, corner blocks, miniature sheets, and First Day Covers are also planned and will be available for purchase through the GPO. Postage stamps and related items produced by the Grand Duchy of Greifenberg are precious collectors' items and collectors and tourists from far and wide purchase our stamps.
-- HRH Grand Duke Paul 
