For Phone Numbers: If your bot absolutely requires a user’s phone number (e.g., for verification, delivery services), Telegram provides a specific mechanism:
Use a KeyboardButton with request_contact = True. When a user taps this button, Telegram will show a native prompt asking if they want to share their phone number with your bot. This is the only ethical way to request a user’s phone number directly.
For Shared Contacts: If your bot needs access to a contact (not necessarily their own number, but a contact from their phone), use on KeyboardButton to prompt the user to select and share a specific user or chat.
>For Other Data: For any other personal data your bot might process (e.g., location, email, preferences), clearly explain why you need it and get explicit, informed consent before collection.
Implement Data Minimization
Collect only what you absolutely need.
Principle: The less data you collect, the telegram number database less data you have to secure and the lower the risk in case of a breach.
Apply to Contacts! Does your bot truly need a user’s phone number! or can you identify them by their user_id (which Telegram provides automatically when a user interacts with your bot)? Usernames are often sufficient for communication.
Ensure Robust Data Security
Protect the data you online reputation management (orm) in marketing collect.
Encryption: Store any collected contact data (and other personal data) with strong! encryption at rest (in your database) and in transit (when clean email communicating between your bot server and external services).