https://techcrunch.com/2018/02/16/visa-coinbase-not-at-fault/

Yesterday, we wrote that Coinbase customers were being charged multiple times for past transactions.

While some speculated that the erroneous withdraws were down to a Coinbase engineering issue, Coinbase issued a statement saying it wasn’t liable for the duplicate charges. The blame, instead, rested with Visa for the way it handled a migration of merchant categories for cryptocurrencies, Coinbase said.