It sounds like you have a merchant that did not balance their credit card terminal for a couple of days and are now submitting the transactions for payment.
There is no such thing as a stale dated debit card transaction. VISA/MasterCard rules require that you attempt to post the transactions to your customers' accounts. If you are unable to post some of the transactions due to the account being closed or overdrawn and uncollectable, you may file a Late Presentment chargeback against the merchant for those transactions to recover the funds for the Bank.
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