6 letters September 1940-May 1943, all to Germany and refused by the censor (cancels or labels Zurück, Terug afzender, Retour) and, some with indications such as no picture postcards, no stamps or indication on label

Postcard Amsterdam 23.IV.1941 to Nice, with red Zurück!/ Postverkehr nicht/ zugelassen and letter Rotterdam 13.X.1943 to Marseilles with label Postkantoor te Rotterdam/ RETOUR AFZENDER/ Verzending niet toegelaten/ K 1124/ Bedrijfsnr 0/1902/407 (rare label)

4 censored letters November 1941-January 1942 to Dutch Indies, from USA November 13 to Batavia (arrived December 4) December 14 to Sumatra (suspended/ return to sender), Switzerland January 28 to Soerabaja (with Capetown censor and returned to sender) and South Africa December 8 to Bandoeng, arrived 22 December

Air mail letter Beverwijk 10.XII.1941 to USA with child welfare 2½, 5 (4x) and 7½ cent (3x) with blue framed censor Zurück - Retour/ kein Postverkehr -  A.B.P. (return sender, no connection), December 10, 3 days after Pearl Harbor and the day before the US declared war on Germany, only handstamp of the Auslands Brief Prüfstelle without censor sealing or handstamp 

16 censored letters and parcel and postcards from the Netherlands to or from labour camps in Germany and occupied countries (including Retour Afzender/ Geen Postverbinding, return sender/no connection), purple framed Arbeiterpost on letter from French coast and black unframed Arbeiterpost on letter from Belgian coast with Feldpost and postcard 5 cent to Ravensburg 26 March 1945, intercepted by the Allies and label Terug aan den afzender with Dutch censor