PayPal Express receiving "Security header is not valid" error

  • cecibispo2017
    Asked on March 14, 2019 at 6:47 PM

    paypal express error

    na error has ocurred, please contact form administrator for assistence

    security error

    security header is not valid

    Jotform Thread 1761569 Screenshot
  • jherwin
    Replied on March 14, 2019 at 9:48 PM

    The security header is not valid error usually means that there is an issue with provided API credentials.

    Please re-check the PayPal API credentials on that form. Also, please note that PayPal API credentials for Live and Sandbox modes are different.