When a buyer buys a collection only item, they have to pay through eBay checkout, as cash on collection is no longer allowed.

After paying they receive a 6 digit QR collection code.

You could send the member a polite message after the item has been purchased and paid for that they must bring along that code, as you cannot release the item without it.

Scanning the code, or entering the numbers manually alongside ...confirm collection, is your only proof of collection ( delivery) and that is when your payout can be released.

@carpfisher201