Georgia exit point
When you enter Georgia, they will ask you at which border crossing you plan to exit the country. Trying not to outrule any options, i said, i don't know yet. The guy says, well, can I write 'red bridge'? I said, ok, whatever.
Big mistake. The exit point specification goes into your bike's customs document, and it is binding. When I tried to leave the country at some other border crossing, they would not let me out, as it was not the exit point specified in my customs document.
So what do I do, I asked. You can go (all the way back) to Tbilisi Customs Department office and have your customs document changed, they said. Or you may go to the specified exit point and return immediately. This will produce a new customs paper wit the then (hopefully) correct exit point specified.
Welcome to the caucasus.