This happened to me with a france. I didn't get stamped on the way out. Out of precaution, I asked for a stamp when I returned to the US.
Nothing happened immigration at MAD asked me few months later in MAD. I told them - France didn't stamp me. That was the end of it, they stamped me back in, and have a nice day.
Went on the Chanel Tunnel to France last year, drove upto the booth, didn't even stop and got waved me through. The UK isn't in the Schengen Area. Might as well have been!
Last edited by FN-GM; May 18, 2014 at 4:54 pm