eBay said it will roll out in the next few months a new "Unpaid Item" process, formerly called the Non-Paying Bidder process. Features of the new Unpaid Item process include:

• New buyer and seller communication system, where members involved in a disputed transaction can communicate directly with each other right on the eBay site to help complete the transaction. Since buyers and sellers communicate via the eBay site, the risk of buyers not seeing payment reminder emails is reduced.
  
• New Unpaid Item Dispute Console for sellers to better track and take action on their Unpaid Items.
  
• Shorter waiting period for Final Value Fee credits – from 17 days to 14 days or fewer – and an immediate filing option if both the buyer and seller mutually agree not to complete the transaction.
  
• Immediate, one-step Final Value Fee credits in the event sellers encounter suspended buyers or buyers from a country to which sellers designate in Sell Your Item (or other listing tools) they won't ship.
  

eBay will include the new Unpaid Item process in the API in order to enable third-party vendors to take advantage of the feature. eBay will host a workshop on Tuesday, May 18th at 11:00 PT to discuss ways that sellers can reduce Unpaid Items and answer questions about how the new process will work.

http://www.ebay.com/securitycenter/unpaiditemprocess

http://pages.ebay.com/help/announcement/upi.html