This has almost nothing to do with a "postcode loophole" and almost everything to do with the two following facts: - eBay are supremely uninterested in being a

This has almost nothing to do with a "postcode loophole" and almost everything to do with the two following facts: - eBay are supremely uninterested in being an unbiased arbiter of disputes. This goes back as far as I can remember and likely to the dawn of eBay. People have been scamming each other on there for 15 years at a minimum. - Royal Mail do not provide proof of postage at a granular level. Combine that with the above where eBay will probably take a piece of tissue paper as proof of postage and there you are.