Certain countries won't let a visitor enter if they have a passport stamp from certain other countries.
One case is Azerbaijan which will not permit you to enter if you have a stamp of Nagorno-Karabakh.
In some parts of the world with problems like this the place with the controversial stamp may put it on a separate piece of paper rather than in your passport. Reportedly Cuba will do this for Americans for instance.
Does anybody know whether Nagorno-Karabakh will do this?
Yes this is possible 100%. I just came back from a visit to Armenia and Nagorno Karabagh. The visa agent at Nagorno Karabagh will ask you if you want to have the visa on a separate paper. This is very common since most foreign visitors will prefer it this way. That was my experience. If one agent forgets to ask just ask it yourself, they are willing to do it.
I don't think its possible. When we went there last year they insisted on placing a full-page sticker visa into our passports. You might be lucky, but I don't think there is an official way to get it done.
You might be able to get a second passport from your Government. Some, like the UK, do this due to this problem.
