Can shipping be changed after an item is paid and shipped?

[omgitlightsup]

If, for example, eBay calculated shipping at $20, but the actual cost of shipping was $60, is it possible to change the invoice after an item has shipped, so that the buyer can cover some or all of the remaining 40?

Thanks!

[aeparts1]

If you are the buyer, & you have the package, send a check to the seller's return address on the shipping label for whatever you feel is fair. Old fashioned way to do it, but no need to involve Paypal or eBay.

You can see what the package weight & size are on the label, but you don't know that is what the seller entered  when they wrote the listing. The seller could have easily entered the wrong info when they wrote the listing, & corrected it when they shipped.

[nobody*s_perfect]

Yes, the UPS shipping calculator in eBay listings is 99.99% accurate, so discrepancie are nearly always due to user error.  

But the OP said this item was shipped via UPS.  The only item he's left feedback for lately listed shipping via USPS, so it's unclear whether this thread is about a different item, or if the seller changed shipping carriers.

[omgitlightsup]

I'm sorry, but you are simply incorrect about this. I have run against this problem as a seller myself. 

I imagine you just pulled "99.99%" out of the air for dramatic near-completeness; and not from any statistical source. But let's go with it... now think about this: eBay handles about two billion transactions daily. That means that if a third of them use calculated shipping, nearly 70,000 packages daily are charged inaccurate shipping.

Something that happens 70,000 times a day is bound to happen to you sooner or later. You may just not use it enough, or perhaps the sort of packages you use it for are less prone to errors.

[nobody*s_perfect]

Indeed, the 99%+ is based on my own experience not only in shipping but in many years on these discussion boards where the USPS shipping calculator problems are nearly always due to user error.

In turn, I question your "two billion transactions daily."   At 2 billion transactions per day for 90 days, that would be 180 billion transactions per quarter.  eBay's own Q3 report says they had a Gross Merchandise Volume just under $20 billion for the quarter; surely these didn't average just 11 cents each.

https://www.ebayinc.com/stories/news/ebay-inc-reports-better-than-expected-third-quarter-2021-result...

Also, since nobody's perfect, I will point out a significant typo in my comment above which was a reply to nocoolnamejane's comment that "The shipping calculator for USPS is pretty accurate": I meant to say that the USPS shipping calculator is 99.99% accurate, which could be inferred from my next sentence, "But..."  I have no experience with the UPS shipping calculator, but based on these discussion boards I agree that there's a significant error rate, though I don't know whether the source is the tool or the usr.