@johnjefprks
Your eBay Standard Envelopes (ESEs) may have become victims of the dreaded USPS three-day weekend.
First of all -- did you mail your ESEs in the "Metered Mail" slot in your post office lobby? If you did, that's a big help, as all that "metered mail" is pre-sorted and can be loaded right into the high-speed (32,000 envelopes her hour!) sorting machines as soon as they arrive at your USPS Distribution Center, which is very likely in another city, or even in another county.
However. . .since you mailed your ESEs on Thursday February 15, that means that USPS did not pick up that mail until late in the afternoon that day -- and (due to the three-day holiday, with some USPS employees sloughing off on the day before) that mail may not even have been accepted at the next USPS Distribution Center yet, and may still be sitting inside a USPS truck -- where it will possibly remain until Tuesday February 20.
But wait -- it gets worse.
If you simply handed your ESEs to a USPS counter clerk, or your USPS delivery carrier, or mailed them from your own home mailbox or a USPS "blue box," or a business mail box -- the ESEs will not be receiving an "Accepted" scan, until they have been sorted at the USPS Distribution Center. And, since you haven't yet seen an "Accepted" scan, the earliest possible day is Tuesday February 20 -- and even later.
Which is why several of us keep recommending to mail the ESEs only in the "Metered Mail" slot in the post office lobbies -- the ESEs often move faster, acquiring that most-important "Accepted" scan within only a day or so.
As for why your buyers are opening up "item not received" cases already -- that's just plain crazy, considering the USPS three-day weekend. And any eBay customer service reps that believe that that's legitimate should re-read the eBay handbook on delivery estimates.
