Our local FedEx once asked me for my details so they could be able to declare my package to the customs and in the SMS message they said that "The sender is paying all declaration fees." I sent them my info and got my package.

Then about five months later, I got a bill from FedEx for import fees, tax and service charges. Had to fight with FedEx for some time about it but eventually they agreed to void the bill. At this point in time, I have no idea if I paid the taxes when I bought the stuff, if FedEx paid them out of pocket or if the sender paid them out of pocket.