Did a quick google search myself and the info I found was maddeningly unspecific on what 'identity papers' and travel documents consisted of. Based on a quick read through I would say it consisted of a passport/identity card, containing a photograph, physical description, birth nationality ethnicity and religion denomination, a birth certificate probably giving much the same information a visa or letter giving permission to travel, starting point destination method and route of travel reason for travel, an official letter of introduction or recommendation authorising that you were of good standing and allowed to travel, other travel documentation in the form of tickets etc, ration card or coupons etc.
The two sites below don't give much actual detail of the documentation but do give some insights into the routes taken through occupied Europe for displaced military personnel or other refugees travelling legitimately or illegally.
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Date: 2007-10-24 04:40 pm (UTC)The two sites below don't give much actual detail of the documentation but do give some insights into the routes taken through occupied Europe for displaced military personnel or other refugees travelling legitimately or illegally.
http://www.bbc.co.uk/ww2peopleswar/categories/c55505/
http://home.clara.net/clinchy/neeb2.htm
Hope this is useful and good luck with Nanowrimo!