Error CP309 occurs when you update your Xbox Live account address from an Xbox One console

You see the following error code and message when you update your Xbox Live account address information from an Xbox One console:

• CP309
• Your city, state, and postal code didn’t match. We’ll go back to where you can check and fix them.

This means that the city, state, or postal code you entered do not match and are incorrect.

To resolve this problem, go back and reenter your city, state, or postal code again. Make sure that the information you enter is correct.

If you keep experiencing the problem, contact Xbox Support.