Root Cause

• Insufficient balance or credit limit: The customer's account does not have enough funds to reserve the preauthorization amount.

• Payment method restrictions: The card or payment method has limitations that prevent preauthorization transactions.

• Incorrect payment details: Invalid or outdated card information caused the preauthorization attempt to fail.

• Bank or issuer declined preauthorization: The bank flagged the preauthorization request as invalid or suspicious and declined it.

Troubleshooting and Solutions

• Recommend checking that the payment details provided are accurate and up to date.

• Ask the customer to verify that their payment method has sufficient funds or available credit for the transaction.

• Suggest using a different payment method if the issue persists.

• Advise the customer to contact their bank to understand why the preauthorization failed and resolve any account or card restrictions.

• Retry the transaction only after confirming that the payment method is valid and capable of completing preauthorization.