Get Help With Payment Processing Error: Card Not Authorized

• What does Card Not Authorized mean?
• I got the error message Card Not Authorized. How do I fix it?
• How do I troubleshoot the Card Not Authorized error?

The Card Not Authorized error could be due to a card being flagged by the bank for unusual activity. To troubleshoot: 

1. Verify the card is active and unrestricted. 
2. Try a different card. 
3. Encourage the guest to contact their bank for next steps.