https://www.cnbc.com/2018/02/17/worldpay-and-visa-reversing-duplicate-transactions-for-coinbase-users.html

Payments processors Worldpay and Visa said Friday they are reversing duplicate transactions that recently caused unauthorized withdrawals for some users of cryptocurrency exchange Coinbase.

"Worldpay and Coinbase have been working with Visa and Visa issuing banks to ensure that duplicate transactions have been reversed and appropriate credits have been posted to cardholder accounts," the two payments processors said in a joint statement published Friday evening New York time on Coinbase's Medium blog."This issue was not caused by Coinbase."