Why I am receiving the error CERT_AUTH_REQUIRED?

This error occurs when a certificate login request fails because either:

• The certificate isn’t detected in the request, or
• Your Betfair account cannot be authenticated (e.g., incorrect password).

Checklist

1. Ensure the certificate is uploaded to your Betfair account.
2. Confirm your login code points to the correct certificate directory.
3. Verify you are using the correct account password.
4. If your password contains special characters, URL-encode it (e.g., p@ssword2021 → p%40ssword2021).

Testing with cURL

Run this command (replace placeholders with your own values and provide full paths for cert & key files):

Expected Response (success):

If issues persist, follow additional troubleshooting tests from the Betfair API documentation.