Order Declined. Reason: "Security header is not valid"

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Order Declined. Reason: "Security header is not valid" - Wed - Jan 15, 2025 - 12:09pm

Stacy Chapman

Updated: Wed - Jan 15, 2025 - 12:09pm ⚬ 0 Comments Credit Card Processing

If the transaction is declined and the message says ‘Security Header is not valid’, check your PayPal account to see if it is active or still pending. You may need to contact PayPal directly to ensure you have the correct PayPal Website Payments Pro account and that it is active and ready for use. If your account is active, check the API information that you pasted in to your ThunderTix account, and make sure that there are NO spaces before or after the information.

Please make sure you have followed all the steps for PayPal integration listed in the link below:

https://admin.thundertix.com/discussions/145

As of July 2020, ThunderTix is no longer supporting PayPal Payments Pro.

View our video tutorials Do I need to complete a questionnaire for PCI compliance? How do I connect my Authorize.net gateway with ThunderTix? Where can I get my Verified Gateway Seal for my checkout page? Declined Card, but Pending Charges on Bank Account How do I connect my Moneris account with ThunderTix? What credit card readers will work with ThunderTix? Authorize.net error - "The merchant login ID or password is invalid or the account is inactive"