The buyer would habe received a pick up code:
For proof of pickup, you can use the eBay app to scan the QR code or manually enter the 6-digit code the buyer received after completing their purchase.
To scan the code, go to the Arrange pickup screen on the eBay app and tap the Scan to confirm pickup button. Once you've scanned or entered the buyer's code, the item will be marked as delivered. You'll still need to mark the item as paid if you collect payment at the time of delivery.
If the buyer doesn't have their email with the codes, they can also access the code by going to their Purchase history in the eBay app. Alternatively, a signed receipt/invoice or an eBay message from the buyer confirming they collected the item can protect you against item not received cases.
