Although it may be the cheapest service and we continue to offer it to our customers , PCXS strongly recommends against using USPS as a carrier . We have seen many instances of lost packages at this time of year as we approach the end of the year. It will be the customers responsibility to chase USPS for updates and also to file a lost package claim , which is a lengthy process. So please bear that in mind when selecting the carrier during the checkout process.