...which doesn't stop the buyer from invoking eBay Buyer Protection which allows them to claim for goods not received, damaged goods or "item significantly not as described." eBay doesn't allow a seller to merely prove delivery to the carrier. If the item you're shipping is worth 249.99 or less and you want your ass covered, you'd better have a tracking number that proves delivery to the buyer's confirmed payment address. $250.00 or above, a signature that proves delivery to the buyer or someone at the buyer's delivery address/carrier pickup. Any less than that and you aren't covered by Seller Protection policy.