Starting September 9, 2019, we are rolling out a change to prevent the same Payments accounts in the Google Ads API (billing accounts in the AdWords API) from being used across manager account hierarchies. Only valid Payments accounts belonging to the Google Ads manager account hierarchy can be used to create and update billing setups in the Google Ads API.

How does this affect you?
For your authenticated Google Ads client account

• PaymentsAccountService.ListPaymentsAccounts() will return only valid Payments accounts belonging to your Google Ads manager account hierarchy, and
• BudgetOrderService.getBillingAccounts() will return only valid billing accounts belonging to your Google Ads manager account hierarchy.

Therefore, you may get fewer results from those API calls than before.

What do you need to do?
Google Ads API
When creating/updating a new billing setup, you will need to select a valid Payments account returned by PaymentsAccountService.ListPaymentsAccounts(). If you use an invalid Payments account during the above processes, the INVALID_PAYMENTS_ACCOUNT error will be thrown.


AdWords API
When creating a new budget order, you will need to specify a valid billingAccountId (the ID of a valid billing account returned by BudgetOrderService.getBillingAccounts()). If you use an invalid billingAccountId during the above process, the BudgetOrderError.INVALID_BILLING_ACCOUNT error will be thrown.

As always, if you have any questions, feel free to post your questions on the Google Ads API forum.

 - Thanet Knack Praneenararat, Google Ads API Team

Source: Google Ads Developer Blog