Privacy Policy

Last updated: March 8, 2026

1. Introduction

w4check ("we", "us", "our") operates the @w4check_bot Telegram bot and the w4check website. This Privacy Policy explains how we collect, use, and protect information when you use our services.

2. Information We Collect

2.1 Information You Provide

When you use the bot, you send us cryptocurrency wallet addresses to check. We process these addresses to perform the requested screening.

2.2 Automatically Collected Information

When you interact with the bot via Telegram, we may receive your Telegram user ID, username, and chat ID as provided by the Telegram Bot API. We do not collect IP addresses, device information, or browser data through the bot.

2.3 Website

Our website uses Google Analytics (Google LLC) to collect anonymous usage data such as pages visited, time on site, referral source, approximate geographic location, and device/browser type. Google Analytics uses cookies to distinguish unique visitors. This data is used solely to understand how visitors interact with the site and to improve the service. We do not use any other third-party tracking scripts. For more information on how Google processes this data, see Google's Privacy Policy.

3. How We Use Information

We use the information we collect solely to:

• Process your wallet screening requests
• Generate compliance reports
• Enforce rate limits
• Prevent abuse of the service

4. Data Sharing

To perform wallet screening, we query third-party data sources including blockchain infrastructure providers, sanctions databases, and risk intelligence services. Wallet addresses you submit may be sent to these providers as part of the screening process. We do not sell, rent, or share your personal information with third parties for marketing purposes.

5. Data Retention

We may retain request logs (including wallet addresses and Telegram user IDs) for a limited period for rate limiting, abuse prevention, and debugging purposes. Generated PDF reports are delivered to you via Telegram and are not permanently stored on our servers.

6. Data Security

We implement reasonable technical measures to protect the information we process. However, no method of electronic transmission or storage is 100% secure, and we cannot guarantee absolute security.

7. Your Rights

You may contact us at contact@tellian.io to request information about data we hold related to your Telegram user ID, or to request deletion of such data.

8. Children

Our services are not directed to individuals under the age of 18. We do not knowingly collect information from children.

9. Changes to This Policy

We may update this Privacy Policy from time to time. Changes will be posted on this page with an updated revision date.

10. Contact

For questions about this Privacy Policy, contact us at contact@tellian.io.