Hi,
The Paris museum pass website (http://en.parismuseumpass.com/rub-u-old-version-and-new-pass-28.htm) states that unused expired passes (circa 2008) can be exchanged for the latest pass by individuals . It actual shows a picture of the pass I purchased back then (A lopped of Mona in the middle of the pass).
Their email response, however, says that no expired passes can be exchanged. Second email was unanswered. Has anyone tried exchanging old museum passes?
Bob F