we do not know what the platform account is

Hi,

Thank you for contacting ExpertHelp LLC. My name is Rofel and I am here to help you resolve your issues. Please wait while I prepare my answer for you. I might ask you to provide additional information if needed so I could provide you the steps that will resolve this issue. Appreciate your patience.

Hi,

Thanks for waiting and sorry for the delay. May I know the version of the COD that your son is using? (Ghost, Elite, Modern warfare, etc.)

I'll be waiting for your response.

Thank you for accepting my answer. But I wish to ensure we work together to have your issue resolved. Please respond by using the blue 'Comment' button from right below your original question on this page.

Thanks for your response. May I know if your son already have a COD account? He can use it on COD: Ghost

The error means that he already have a previous COD XBOX account using the email address that he is trying to register.

Thanks for your response. If you are still getting the same error you can contact Activision Support at ***-***-**** . They will check the why you are getting the error and will help you with the registration/setup of a COD account.

If you have questions please let me know.

You're welcome. If you encounter another issue in the future please dont hesitate to contact us.

Thanks