Originally Posted by tr3k

I have an "executive" class ticket with TAP. The website lets me select seats. When hovering over the seat, it shows "free of charge", but after I select a seat, in the order on the right it says "fee may apply", although never asks for a payment and allows me to confirm.
Could someone with experience using TAP let me know what that means? Is there or is there no fee? Will they demand that I pay at check in?