Apply overflow: hidden; to the container to slice off the banner.
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Warning: While a reverse proxy works well, you must continuously monitor Google’s deployment updates. If Google alters the structure of how they inject their banner frame, your proxy replacement string may break, requiring an update to your script logic. Best Practices & Compliance Apply overflow: hidden; to the container to slice
Sometimes the warning appears because of overly broad scopes. You can reduce or remove scopes to avoid triggering the warning altogether. Best Practices & Compliance Sometimes the warning appears
Google will email you with questions or approval. Once approved, your OAuth consent screen will show a checkmark (“Verified”). Your users will then see a clean permission dialog without the “created by a Google Apps Script user” warning. Once approved, your OAuth consent screen will show
Configure your OAuth consent screen details and add your privacy policy.
If you are a Google Workspace administrator and your application is intended for internal use only, you can remove the warning without going through the full, formal verification process. Google's policy states that verification is for Apps Script projects whose owner and users belong to the same Google Workspace domain or customer.