How to block and unregistered buyer

[4george24]

I've had an item purchased twice in 2 weeks buy unregistered buyers. They don't pay and I'm missing out on a sale because of UT. Want.to block these people..help plz

[eburtonlab]

Unregistered users cannot bid or buy, so likely the user bid or bought first before eBay booted the user for some sort of policy violation.

You can avoid unpaid items by listing for a fixed price with immediate payment and by not accepting offers or using auctions. That way the buyer has to complete checkout and pay or the item remains listed.