ERR_3DS_CALLBACK_INVALID

Description

The 3D Secure callback data failed hash verification. This means the callback may not be authentic.

Common Causes

• Merchant key or salt mismatch between settings and gateway account
• Callback data was tampered with
• Wrong environment (test credentials used in production or vice versa)

Resolution

1. Verify merchant_key and merchant_salt match your gateway panel
2. Ensure test_mode setting matches your credentials (sandbox vs production)
3. Check WooCommerce logs for hash comparison details