You can clear the history of a group chat for yourself

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How to set up: As an admin, go to Group Info > Edit (pencil icon) > Administrators. Select your name (or another admin's) and toggle "Remain Anonymous" on.
Best Practice: If you administer a public group and wish to maintain personal anonymity while performing admin duties, use this feature.
III. Managing Data Within Group Chats
While content isn't E2EE, you still have control over how long data persists.

Deleting Messages:

Your Messages: You can delete your own messages in a group chat for everyone (including other members) within a certain timeframe (usually 48 hours for older messages, but newer messages often have an unlimited deletion window). This removes the message from Telegram's servers for all parties.
Admin Deletion: Group admins can delete any message in a group chat for all members.
Best Practice: If you accidentally send sensitive information in a group, delete it for everyone immediately. As an admin, use this power responsibly to manage content.
Clearing History (for yourself):

. This removes the chat from your device sweden telegram phone number list cloud history, but it remains visible to other members.
Best Practice: Useful for decluttering your own chat list without affecting others.
Leaving/Deleting Group:

Leaving a Group: When you leave a group, the chat history remains for other members.
Deleting a Group (for the Creator): If you are the creator of a group, you can delete the entire group, which will remove the group and its history for all members.
Best Practice: If you no longer wish to be associated with a group or its content, leave it. If you created a group and want its history permanently removed for everyone, delete it.
IV. General Security Practices Relevant to Group Chats
Two-Step Verification (2FA): Always enabled for your entire Telegram account. This is foundational security to prevent unauthorized access to your account, which could then be used to read or delete your group chats.
Passcode Lock: Protects your app on your device, preventing someone from reading your group chats if they get hold of your phone.
Active Sessions: Regularly check Settings > Devices to ensure no unknown devices are logged into your account, which could be accessing your group chats.
Beware of Scams/Phishing in Groups: Public groups can be targets for scammers. Be cautious of links, unsolicited DMs, or suspicious messages from unknown members. Telegram itself will never ask for your password or verification codes in a chat.