USPS is never to be trusted, especially if the address is clear and the parcel is bound for any other country than the United States:
from another board member on here, i wanted to buy a shift linkage for my g-body. he did everything perfectly fine. USPS however sent the package first to richmond in canada and claimed: delivered. then, the package reappeared somewhere in mexico, only to be noted as delivered there too. remember, this was all under the same tracking number...
now we have the unfortunate situation where said board member got a lost part and i got my money back. i really hope, that USPS will repay them. this was the last time i ever trusted USPS. any other carrier gets the hjob done efficiently and in doubt, checks the maps. USPS is like: "grand-duchy of luxembourg? europe??? never heard of them, ah well, lets just throw it into the next truckload and let the next postal service figure it out."