Starting today, customers can choose to automatically associate all newly created accounts (or any accounts invited to their AWS Organization) with an AWS Billing Conductor billing group. By enabling auto-account association, customers can reduce the steps needed to implement a custom chargeback model. For example, organizations can use the feature to automatically associate all newly created accounts with a default billing group, ensuring all accounts are included in their internal chargeback workflow. Partners can use the feature to automatically associate all new accounts to a default billing group, allowing them to bill their customers for all relevant usage without missing any charges.
Source:: Amazon AWS