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Partial Authorizations {#payments-intro-processing-sales-dual-partialauth}
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All debit and prepaid card processors as well as a limited number of credit card processors support partial authorizations when dual-message processing is in place.  
When partial authorization is enabled, the issuing financial institution can approve a partial amount when the balance on the card is less than the requested amount. When a partial amount is authorized, the capture is not processed. The merchant can then use a second card to cover the balance, adjust the total cost, or void the transaction.  
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