Error codes
Important notices(HTTPS-related)
Transaction verification error
Security check fail.
Transaction is unsuccessful due to a SHA-Out issue
How to resolve conflict with WordPress Events Calendar Pro by Tribe
How do we resolve Direct HTTP server-to-server request issues?
How to make product like WOOF - WooCommerce Products Filter plugin compatible
Enabling Direct Https - Server to Server for WPEngine
Enable deeper debugging
ePDQ NCERROR: - Card type not active
Error code of 414: URI Too Long response
Error code: Merchant type not active
Why is AAVADDRESS missing from the ePDQ dashboard and how to resolve it?
Refunding an order returns "The data you entered is not correct" from the error log.
How to disable We are AG custom columns
What does the error message “An error has occurred; please try again later. If you are the owner...” mean?
The 'CPI emulator' will be deprecated on 31 July 2021, would your ePDQ plugin still work?
What is the ACS Challenge Simulator for?
What to do when you've received the email from ePDQ about "We're activating 3D Secure on your Smartpay Checkout (ePDQ) by 31 May 2021"
Does your ePDQ plugin support SCA and 3D secure (Strong Customer Authentication)?
How to resolve AG Status check failed?
What is unknown order/1/r and how do you resolve it?
ePDQ NCERROR: - Data validation error
Transaction has been denied : Payment refused by the financial institution
Is ePDQ / Barclaycards down? where to check the system status of your payment provider?
What to do if your error log show "the currency is not accepted by the merchant"
What is error "40001134 : Authentication failed" and what do you do if you encounter this error?
Transaction Error Codes, What causes them, and What you can do about it
What to Do When (-1) Page Error Returns After Payment

Barclays ePDQ

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