It's no use turning up one day late to the examiner with your log book and saying "I did the flight two weeks ago , here's the signature, can you sign my license please?"
And that is the really dumb bit. If you have revalidated by experience (i.e. have all the requirements), and have the 1 hr with an instructor (JAA - keep it in the family and all that), why should you not be able to visit an examiner in the future to get the paperwork signed (assuming you haven't flown past the expiry date of course).
The CAA once had my logbook and licence for IMC issue, I had plenty of experience and also a 1 hr flight signed by a JAA instructor. I asked them if they could just "revalidate" my ticket while they had it as expiry was due in a couple of months and it would save me some hassle....oooh nooo they said.