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Step 1. Go to Configuration > System Settings > Automation Settings
Step 2: Find the Payment Capture Settings section (In WHMCS 8.1 and earlier, it's labeled as Credit Card Charging Settings).
Step 3: Specify the payment processing timeline by entering the number of days before the due date under 'Process Days Before Due' settings.
Step 4: Select 'Check Attempt Only Once' if you want a single payment attempt. If unchecked, the system will try capturing payment until successful, based on the specified retry frequency.
Step 5: Enter a number greater than 0 for 'Retry Every Week For' to prompt the system to attempt weekly payment capture for that duration until successful.
Step 6: Specify the day for 'CC Expiry Notices Date' to send clients reminders about upcoming credit card expirations.
Step 7: Select 'Do Not Remove CC on Expiry' to retain the client's credit card details even after the card's expiration date.
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