I have a new EA account / can't remember the old one / registration

Correct me if I'm wrong,you forgot details of your old Origin/EA account,that has your present Xbox live profile.

Now you are try to link that xbox Live profile to a new Origin /EA account.

You can try this.

Click for Guide  https://help.ea.com/article/forgot-my-origin-ea-account-or-if-its-linked

The following articles should help you to resolve this issue and give you tips for linking your Gamertag:

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• Linking Your Gamertag, PSN ID, or EA Classic Screen Name
  
  

   

  Your Gamertag/PSN ID, PSVita Online ID, and EA Account should be correctly linked when you first access an EA game online. 
  
  We recommend checking your Origin account to see if the emails are matching. 
  
  If the email address for your Gamertag/PSN/PSVita ID is different than the one for your Origin account, you will require assistance to properly link them. 
  
  This can be done by contacting an EA Game Advisor. On the contact page, you will have to log in into your EA account. Once you have done this, please fill in the Product, Category and Platform fields to contact us.

  
  
  Did you forget if your Origin/EA Account is linked to your Gamertag/PSN ID?
  
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• I Forgot my Origin/EA Account or if it's Linked to a GamerTag/PSN ID! 
  
  If you can't remember what your Origin/EA Account is, or if you're not sure whether you have one linked to a GamerTag or PSN ID, here's how to find out:

  1. Go to profile.ea.comand select "Reset Password" (with link), then either
     • Enter an email address you may have used for your account OR
     • Select "Account Type" (XBL Gamertag or PSN ID)
  2. Enter your Gamertag or PSN ID, and submit.

  Check the email address referenced on the next page for your account details. If you are still not able to determine what your Origin Account is, or if you have one linked to you Gamertag or PSN ID, then please contact us for help.
  
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• Origin and Your Other Personas

  
  You may be having trouble importing your XBox Live Gamertag or Playstation Network info if it is linked to an account other than your main EA account. To recover or make changes to your XBox Live Gamertag or PSN ID, be sure to contact a game advisor.

  Directions for adding your PSN or Xbox Live ID to your EA Account can be found here.

   

  Picture to help you understand better,  https://help.ea.com/article/welcome-to-the-new-and-improved-ea-help-center

Please check out all informations provided there and to let us know if the issue has been resolved by using the button "Solution". If not, please keep posting in this thread with additional information.

Hope this helps
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***Please note...I do not work for EA/Origin. Questions belong in the forums,Solution is like medicine,same medicine/solution may not work on same problem.I'm helping you because I've also suffered in the hands of EA for releasing their half baked products to us,gamers.

I don't answer questions via PM.  AHQ is "Player-to-Player" technical self-help forum