I jumpseated to Amsterdam last week on NWA. Coming from BOS no problems just like jumpseating in the USA. Trying to Leave Amsterdam was another story. KLM does all ground services for NWA in Amsterdam. When I got to the airport I told them I was a pilot and that I wanted to jumpseat out to BOS, they sent me to their employee travel desk. The lady at the employee travel desk told me with out a listing she could not help me and she did not know how to list an offline jumpseater, so she sent me to ticket purchasing, they were no help. I had a friend from NWA list me on a buddy pass to get through security so I could talk to the gate agents. Security in AMS is at the gate but before the gate agents so you have to go through to talk to them, and they really grill you with questions. Anyway at the gate the gate agents told me it was not allowed for off line pilots. I tried to explain to her that it was allowed, and that I had come from BOS on NWA with no problems. She then proceeded to tell me that the people in BOS broke the rules and that it can't be done. At that point I just decided to use the buddy pass and get on the plane. I talked to the Capitan of the flight and he said that yes I was allowed to jumpseat as long as I sat in the back, and he said KLM guys do it all the time on them out of AMS. The Capitan went out and spoke to the gate agents and managers and even showed them in their Flight Opps manual where it says off line jumpseaters were ok, but they refused and told the Capitan they didn't know how to do it. The Capitan offered to make the listing on the computer for them but they would not allow it. So long story short make sure you have a back up. If you are going to jumpseat international, because although it is allowed, chances are the gate agents over there won't know what they are talking about, or won't know how to help you, also NWA does not allow off line jumpseaters to list, (I have called and tried), but I would definitely try to do that on another airline. I think if I had some sort of reservation it might have worked. Also thanks to that Capitan that tried so hard to get me on, greatly appreciated.