SIANA AVENUE — Cosmetic Formulator Privacy Policy
Effective date: November 11, 2026
This policy explains how SIANA AVENUE handles information through the Cosmetic Formulator subscription verification service. It covers our verification API; OpenAI, Stripe, and Cloudflare also maintain their own privacy policies for their services.
Information processed
When you request subscription verification, our service receives:
- The checkout email address you provide.
- The Stripe subscription ID you provide.
- Technical request information, which may include timestamps, request identifiers, network information, and verification results.
Our service retrieves subscription information from Stripe, including the associated customer email, subscription status, subscription price, live-mode status, and whether payment collection is paused.
The verification endpoint does not request your card number, card security code, banking password, or Stripe account password. Payment information entered at checkout is handled by Stripe.
How verification works
The GPT sends your email address and subscription ID to our verification API hosted on Cloudflare. The API queries Stripe and checks whether the information matches an eligible, active Cosmetic Formulator subscription.
The API returns the submitted email, subscription ID, and verification outcome to ChatGPT so the GPT can determine whether to provide premium access.
Why we use information
We use this information to verify paid access, prevent unauthorized access, investigate verification failures, provide support, and maintain the security and reliability of the service.
Service providers and disclosures
Information is processed through OpenAI’s ChatGPT platform, Cloudflare’s hosting and logging services, and Stripe’s payment and subscription services.
We may also disclose information when required by law or reasonably necessary to investigate fraud, protect the service, or enforce our agreements.
Logs and retention
Technical logs may record request metadata, errors, and verification checks. Subscription and transaction records are maintained through Stripe.
Retention depends on the purpose of the information, provider settings, support needs, and applicable recordkeeping requirements. Information submitted in ChatGPT is also subject to OpenAI’s retention settings and policies.
Security
The verification service uses HTTPS and server-side credentials to communicate with Stripe. No method of transmission or storage is completely secure.
Do not submit payment credentials, API keys, or unnecessary sensitive information in a verification request.
Your choices and requests
You may choose not to submit verification information, but we may then be unable to provide premium access.
To ask about information processed by our verification service, request a correction or deletion, or raise a privacy concern, contact SIANA AVENUE through the support contact provided with your subscription purchase. We may need to verify your identity before responding.
Requests concerning information held independently by OpenAI or Stripe should also be directed to those providers. Deletion requests may be subject to applicable legal and recordkeeping requirements.
Changes
We may update this policy as the service changes. The revised policy will display an updated effective date.