Ask your buyer to search through their emails even Spam, their eBay messages and order details for that important collection code.
If they cannot find it, send them this link to contact Customer Services for them to send this code to them.
https://www.ebay.co.uk/help/eua?id=5275&mkevt=1&mkpid
I strongly recommend Not handing over the item without receiving this code, you can send the buyer a polite message explaining the item will not be released without it.
@skallyone
