Originally Posted by cahlgren
They won't tell us what proof they will accept.
Remember it is Portugal
and they are office clerks. They may actually not know themselves what constitutes a proof in such a case. They might be pestering you just to tick a box and claim they are necessary out there.
I am sorry to put this bluntly but I have seen similar cases in Portugal
and also (to a less severe degree) in Spain
If you have a marina slip that has your boat's name on it and if the place where this marina is located clearly qualifies as a non-EU state, then you are on the top. If outward clearance is required (and assuming you did not clear out) then they may punish you for not clearing out but they cannot punish you for not leaving the EU.
Just do not be naive and do not leave the original of the proof in their hands - for they may as well 'lose' it.
I am sorry to possibly sound rough on Portugal but I have visited twice (2003 and 2007) and the administration they had there was as bad as one can get.