Greiser was directly responsible for escalating tensions between the Free City and the Republic of Poland in 1939. When the Polish Foreign Affairs Minister Józef Beck threatened economic reprisals following the harassment of Polish frontier guards and customs officers, Greiser issued an announcement on 29 July 1939 declaring that the Danzig police no longer recognised their authority or power, and demanded their immediate withdrawal. The notice was so rudely worded that the Polish diplomatic representative to Danzig, Marian Chodacki, refused to forward it to Beck and instead sent a court summary.