We have had this response from Paypal Payments Support: From the plugin's perspective, as long as the orders are being declined, that means both the PayPal system and the plugin are doing their job in preventing fraudulent transactions. Unfortunately, there's not much more we can do from the plugin side if the transactions are failing. However, there are several actions you can take to help mitigate attempted fraud: Enable 3D Secure: If you use the Advanced Card Processing feature, enabling 3D Secure can add an extra layer of verification, making it more difficult for unauthorized users to process transactions with stolen card information. Activate FraudNet: In the plugin settings, go to the Connection tab and enable FraudNet. This PayPal service uses advanced fraud detection technology to identify and prevent fraudulent activities. Set Payment Intent to Authorize: Changing the payment intent to "Authorize" allows you to manually review transactions before they are finalized. This gives you the chance to verify orders and void any that seem suspicious before capturing the funds. Use Additional Security Measures like ReCaptcha: You can use a ReCaptcha plugin to add another layer of security. This plugin has been tested and works well with PayPal Payments. You can find it here: ReCaptcha for WooCommerce.
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