An issue with the payment method(s) used to create a billing account can result in seeing this error message (“OR-CBAT-15”). To find the root cause of the error, you can contact [GCP Billing support. If you are not able to contact support in the case of not being a Billing Administrator, check out the documentation below “Alternative options to contact support.” This option allows you to submit a ticket under a category related to problems adding payment methods.