Another account of his rescue activities is a witness report by Dr. Mirjana Tomljenovic-Markovic, but due to a lack of further evidence this has so far not been confirmed: his last attempt to save people involved four Polish subjects (names unknown), three of them Jewish, whom he had already smuggled into Denmark.
Desuden findes Dr. Mirjana Tomljenovic-Markovic's øjenvidenberetning, som ikke har været tilgængelig før nu: Pfeiffers sidste redningsaktion drejede sig om fire unavngivne polakker, heraf tre jødiske, som han tidligere havde smuglet ind i Danmark.