I've been in Rio since August 22nd 2017 and entered on a tourist visa (just a stamp on arrival as I'm from the UK). I foolishly misinterpreted the 180 days within a year rule and assumed I could stay for 180 days straight (taking me up to February 18th 2018). Having looked further into this (I was planning on seeing if it would be possible to extend my visa, I now see that it wouldn't be) I've come to the realisation that I must have only been granted 90 days originally and should have requested an extension for a further 90 days before the original ones were up (November 20th 2017). I've been reading up on the fines and have seen that the 8 reais something has increased to 100 reais for every day I've been here since my first 90 days were up. I just wondered if anyone would be able to shed any light on the matter? Assuming I stayed up until February 18th as planned, would I be looking at a R$9000 fine? Would it be worth my while going to the federal police in GIG (could I go to any federal police station in the city, or would it have to be the airport?), pleading my case and explaining my foolishness and try to get a visa extension for the remaining days? Thank you for any help you can give me!