USPS : We currently are not able to offer live delivery guarantee on Priority mail shipments due to there unreliable transit times. We are also NOT able to help with missing packages or packages delivered to the wrong address via USPS due to the time involved and the number of mistakes they make. Some customers have had to make multiple trips to USPS till they find there packages. There are NO guarantees for any USPS packages.
If you want a guaranteed service you much choose FedEx shipping option due to us having a rep that can help us with situations when they happen.
We look forward to when everything gets back to normal ;)