This kind of bank error happens frequently.

这类银行失误经常发生。

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It's more likely to be a store error than a bank error, since the bank wouldn't initiate a deposit into the account from the store.

这个情况更有可能是商店的失误，因为银行不会在商店发起向你帐户存钱的动作。

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The bank has agreed to give an immediate refund in the unlikely event of an error being made.

银行已同意倘若出现不太可能的错误便立即退款。

《柯林斯英汉双解大词典》

But what about a more straightforward bank error.

FORBES: Bank Error in Your Favor?

If you do find an error on your credit report, address it with the bank or company that initiated the error.

FORBES: How To Check And Improve Your Credit Score

By May 4, the bank became aware of the error and alerted authorities.

CNN: 'Accidental millionaire' pleads guilty to theft