Denmark
Post Danmark has collaborated a number of times with other postal administration to release a joint issue.
| Year | Postal Administration | Topic | Note |
|---|---|---|---|
| 1963 | Greenland | 50th anniversary of the Bohr model | |
| 1967 | Greenland | Wedding of Margrethe II of Denmark and Henrik, Prince Consort of Denmark | |
| 1968 | Greenland | Children's charity | Semi-postal |
| 1969 | Finland Iceland Norway Sweden |
100 years of postal cooperation of the Nordic countries | |
| 1973 | Finland Iceland Norway Sweden |
Nordic House in Iceland | |
| 1973 | Greenland | Volcano outbreak of Heimaey | Semi-postal |
| 1977 | Finland Iceland Norway Sweden |
Nature conservation | |
| 1985 | West Germany | 30th anniversary of the Bonn-Copenhagen Declarations de:Bonn-Kopenhagener Erklärung | |
| 1985 | Greenland | 25th anniversary of Ingrid of Sweden's arrival to Denmark | |
| 1985 | Sweden | 900th anniversary of Canute IV of Denmark's gift to the Diocese of Lund | |
| 1988 | France | Danish–French Cultural Year | "Hommage à Léon Degand", Robert Jacobsen |
| 1992 | Greenland | 25th wedding anniversary of Margrethe II of Denmark and Henrik, Prince Consort of Denmark | |
| 1993 | Russia | 500 years of diplomatic relations | |
| 1995 | Sweden | 450th birthday of Tycho Brahe | |
| 2000 | Sweden | Inauguration of the Oresund Bridge | |
| 2002 | Faroe Islands Greenland |
Centennial of the International Council for the Exploration of the Sea | |
| 2003 | Greenland | Centennial for Danish exploration in Greenland | |
| 2004 | Faroe Islands Greenland |
Wedding of Frederik, Crown Prince of Denmark and Mary, Crown Princess of Denmark | |
| 2005 | Malta | 200th birthday of Hans Christian Andersen | |
| 2005 | Germany | 50th anniversary of the Bonn-Copenhagen Declarations | |
| 2006 | Belgium | Paintings of the avant-garde movement COBRA | |
| 2007 | Canada Finland Greenland Iceland Norway Sweden United States |
International Polar Year 2007-2008 | booklet of souvenir sheets |
Read more about this topic: Joint Issue