Data Trust Principles

Effective November 7, 2026 · These principles apply to the Signature Studio website

Your name and signature aren't used to train AI.

We don't use the names you enter or the signature images you make to train AI models. Our image provider (OpenAI) also doesn't use requests it receives through its API for training, and keeps them for up to 30 days to monitor for abuse before deleting them, longer if the law requires it or it's needed to protect its services or others from harm. Our Hangul spelling provider (Anthropic) doesn't use API requests for training either, and deletes them within 30 days, or keeps them longer if the law requires it or a request is flagged under its usage policy (up to 2 years).

We send as little as possible

• The overseas image provider gets only what's needed to draw: name, initials, emblem, style and pen.
• If you ask for Hangul spelling suggestions, only the name you enter for it goes to Anthropic, a separate provider.
• Your email, account ID, IP address and payment details aren't sent overseas.
• Accounts, the database and images are stored in Seoul, South Korea, and our servers run in South Korea.
• The practice sheet PDF is made on your device and isn't uploaded to our servers.

What we record

• The name and styles you enter, and the options drawn
• Signatures you choose and files you download
• Usage records (viewing and rating options, choosing, downloading) and error codes, used only to improve the Service
• Server logs hold only a request ID and error code, not IP addresses, emails or names
• No advertising, tracking or third-party analytics tools

What you can do yourself

• See and delete your records and signatures anytime in "My signatures".
• Deleting one request also deletes its name, initials, typed words and images.
• Delete your whole account.
• Download your signature files again anytime.

How long we keep it

• Records and images: 1 year after your last visit, then deleted.
• Account details: until you delete your account.
• Deletion record: after account deletion, only the user ID and deletion time stay, so deleted data doesn't come back if a backup is restored.

How we protect it

• All traffic is encrypted with HTTPS.
• Browsers and apps can't reach the database directly; our server reads and writes only after checking ownership.
• Every generated option is marked as an image made with AI.

See the Privacy Policy for details, or contact us.