Caller claims to be eBay customer assistance, but may well be part of a fraud. Action occurs as a transaction started on another internet site is "moved" to eBay for security. The fake eBay email message directs you to 866-802-3685. Ebay said if there is no message on your ebay account then it is fraud. The number that calls you back is 810-545-8222 and claims ebay security/customer assistance. Call the numbers from the ebay website customer assistance and they identify this as fraud.