When communicating with the IPN notification, the order information is sent back to PayPal in a secure manner through PHP native OpenSSL capabilities or through cURL when OpenSSL is not available, or through a normal unsecure manner when no secure communication means exists, to confirm the order made.

If the result is successful, the order status is updated automatically to show a successful order has been made. Invalid orders are left alone for the store administrator to verify.

This module also has OpenSSL public/private key encryption capabilities to securely send the order information to PayPal during the checkout procedure.