Amlov
Active member
Surely the question here is whether your friend's 90 days have elapsed. If it is still less than 90 days since they first entered the Schengen zone then the problem may not be significant. A simple trip to France and a shrug to say 'someone must have forgotten to stamp my passport' when they came through customs might work. Clearly they would be outside of the Schengen zone now, so an explanation that the passport wasn't stamped when coming through customs would be plausible. I don't believe that French customs currently record entry electronically, they just check electronically to see if you have an outstanding flag against you, such as motoring offence.
If it is more than 90 days since they entered the Schengen life is going to be more difficult. It might be possible to provide proof that your friend was outside of the Schengen during this period and didn't exceed their 90 days, but there can be no guarantee that this would be accepted as the customs official has no idea how may days they actually spent in the Schengen zone.
Personally, if it were me, I would wait until 180 days after first entering before returning to the Schengen zone and then use the shrug and someone forgot to stamp it line.
If it is more than 90 days since they entered the Schengen life is going to be more difficult. It might be possible to provide proof that your friend was outside of the Schengen during this period and didn't exceed their 90 days, but there can be no guarantee that this would be accepted as the customs official has no idea how may days they actually spent in the Schengen zone.
Personally, if it were me, I would wait until 180 days after first entering before returning to the Schengen zone and then use the shrug and someone forgot to stamp it line.