I think it's called accessory after fact when someone learns of a crime and provides assistance to its perpetrator to escape responsibility.

How else would you call EBay's action, or lack of action, when it's timely informed of a fraudulent/false claim of "Not As Described Return/Refund" by a Buyer and issues a refund to such Buyer directly from my pocket (PayPal) without my authorisation.
It's shrewd way to get paid fees multiple times by promoting returns by Buyers.