Rubuta ci gaba ga wannan sakin layi - Tsakanin 1939 da 1943 ya kasance a Ofishin Harkokin Waje a cikin unguwar gwamnati ta Berlin. Ya shiga cikin harkokin diflomasiyya kafin mamayewar Denmark a 1940
, kuma ya ɗauki umarni ga ofishin jakadancin, tare da rigar janar don Kurt Himer, a cikin jakar jakadancinsa zuwa Copenhagen a ranar 9 ga Afrilu, 1940, ranar mamayewa. Bayanin da Schlitter ya bayar ya ba Himer da ma'aikatan ofishin jakadancin a Copenhagen da Oslo damar sanin abin da ke faruwa.