Recurring 429 "prepayment credits are depleted" on Postpay (Paid Tier 3) project — manual billing sync request

Hello Google team,

I’m requesting a manual billing sync and an investigation into a recurring billing issue on my project. Every generateContent call fails with 429 RESOURCE_EXHAUSTED, message “Your prepayment credits are depleted”, even though my account is Postpay (pay-as-you-go) with a positive balance and available payment limit.

This is not a one-off — it has been happening frequently, almost every day, for an extended period. The latest episode started today at ~06:00 BRT (UTC-3) and is ongoing. This matches the Postpay → “prepayment credits depleted” billing-sync bug that several others have reported here over the past weeks.

Account / project details:

  • Billing Account ID: 01DAA8-D7A59E-647F..
  • Project number: 2038115188..
  • Billing tier: Paid Tier 3 · Postpay
  • Region / Country: Brazil

Billing state (account is funded — credits should not be “depleted”):

  • Current balance: R$ 2,735.44
  • Minimum payment limit still available: R$ 7,264.56
  • Payments processing normally: R$ 2,055.55 on Jun 1; prior transactions Apr 30 and May 31; latest transaction Jun 26 (R$ 2,734.38). Billing is clearly active and paid.

Error:

429 RESOURCE_EXHAUSTED
{ "error": { "code": 429, "message": "Your prepayment credits are depleted. Please go to AI Studio ...", "status": "RESOURCE_EXHAUSTED" } }

What works: ListModels / models.list returns normally; the key authenticates fine.
What fails: generateContent returns 429 on every call.
Onset of current episode: today, ~06:00 BRT (UTC-3).
Frequency: recurring almost daily for an extended period.
Scope: affects all API keys on the project simultaneously.

Because this keeps recurring, a one-time sync may not be enough. Could you please (1) trigger a manual billing sync for this project / billing account, and (2) investigate why postpaid billing repeatedly fails to be recognized on this project? Happy to provide any additional identifiers privately. Thank you.