- Processing Payments Using Credentials
 
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    Partial Authorizations
    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.