The Treaty of Zgorzelec (Full title The Agreement Concerning the Demarcation of the Established and the Existing Polish-German State Frontier, also known as the Treaty of Görlitz and Treaty of Zgorzelic) between the Republic of Poland and East Germany (GDR) was signed on 6 July 1950 in Polish Zgorzelec, since 1945 the eastern part of the divided city of Görlitz.
The agreement was signed under Soviet pressure by Otto Grotewohl, prime minister of the provisional government of the GDR (East Germany) and Polish premier Józef Cyrankiewicz. It recognized the Oder-Neisse line implemented by the 1945 Potsdam Agreement as the border between the two states. The terms referred to the "defined and existing border" from the Baltic Sea west of Świnoujście (Swinemünde) - however without mentioning Szczecin (Stettin) - along the Oder and Lusatian Neisse rivers to the Czechoslovak border. Thereby the East German government also accepted the division of Küstrin, Frankfurt (Oder), Guben and Görlitz.
The treaty was worded as a declaration and was not recognised as a legitimate international treaty by West Germany insisting on its exclusive mandate and the members states of NATO. Four years later when the Soviet Union granted East Germany independence, the Soviet Union reserved rights over East Germany (similar to the rights reserved by the Western Allies over West Germany under the Bonn–Paris conventions) pending a final peace treaty with Germany - the 1990 Treaty on the Final Settlement with Respect to Germany. So although the treaty was binding on the two states, it was not seen by many western members of the international community as such. The West German government stressed that the status of the territories east of the Oder-Neisse-line were "under Polish and Soviet administration" until, in 1970, Chancellor Willy Brandt signed the Treaty of Warsaw, in effect giving de facto acknowledgment of the border. Reunited Germany accepted the Polish annexations with the German–Polish Border Treaty (1990).