The Polish envoy (Jan Zygmunt Michałowski) presented his credentials to the King of Sweden (Gustav V) in Stockholm- Establishment of diplomatic relations: 2/8/1919, Information provided by Poland.
The Swedish envoy (Per Gustaf August Cossva Anckarsvärd) presented his credentials to the Chief of State (Józef Piłsudski) in Warsaw: 2/6/1920, Information provided by Poland.
The establishment of diplomatic relations between the Provisional Government of National Unity in Warsaw and the government of Sweden occurred as a result of the exchange of diplomatic notes. Sweden recognized TRJN de jure and decided to establish diplomatic relations with it: 6/7/1945, Information provided by Poland.
The Swedish envoy (Cläes Adolf Hjalmar Westring) presented his credentials to the President of the National Council (Bolesław Bierut) in Warsaw: 17/9/1945, Information provided by Poland.
The Polish envoy (Adam Ostrowski) presented his credentials to the King of Sweden (Gustav V) in Stockholm: 21/9/1945, Information provided by Poland.