Usps first class mail international tracking not updating
I had issues with them not scanning during the transit stages. I received, as buyer, a Sig required package the other day.
My buyers kept bugging me about not dropping off the packages. They didn't get my Sig , they just left the package. and mistakes are more likely this time of year when volume is increased enormously, and all the carriers hire temporary holiday help.
It also doesn't have expedited brokerage, which means packages can "sit in customs" for up to 4-6 weeks. Packages are sometimes not delivered at all (1% of cases), so this method is to be used at your own risk!
I've never had a situation when package is delivered and it is not scanned. I would say that their scanning is reliable about 95% of the time, but that other 5% of orders can be a real pain.
Neither the sender nor I have received any notice from the USPS.
Sure there are some missed scans along the way but the vast majority of my packages have multiple scans.
I know that USPS can be sloppy with the scanning and tracking.
I've never had a situation when package is delivered and it is not scanned.
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I would also point out that there has been a major lag in USPS scans updating into Amazon tracking over the past few months - often it takes 1 to 2 days for the information you can see on to update to Amazon.