How to add CAPTCHA to a Telegram group with VibeGuard

You need to be the group owner or an admin who can manage bot permissions, join requests, and group safety settings.

VibeGuard Join Gate can verify or score newcomers before they write, post links, post media, or get approved into a group. It is group-scoped, so every Telegram group keeps its own join gate settings, newcomer policies, moderation state, profiles, recaps, AI usage, and Mini App context.

You do not need to enable every gate on day one. A safe first setup is simple: open Security Center, choose one verification method, keep enforcement cautious, and review real newcomer behavior before adding stricter actions.

Open Security Center from Telegram and make sure you are viewing the correct group.

Go to the Join Gate or Safety setup area. Check whether the bot has the Telegram permissions needed for the workflow you want. Join request review requires the relevant approval permissions. Restricting members before verification requires restriction rights. Deleting temporary greeting or challenge messages requires delete-message rights.

If you are not sure which permissions to grant, start with a lighter setup and keep actions review-only until the group is ready.

VibeGuard can support different join gate styles depending on how strict your group needs to be.

For low-friction groups, use button acknowledgement. A newcomer taps that they agree to the rules, and VibeGuard records the verification.

For bot-wave protection, use CAPTCHA. A newcomer solves a visual, text, or button challenge within a time limit. Failed or expired challenges can route to retry, admin review, kick, or decline only when admins enable that action.

For groups with stronger policies, use a rules quiz. Newcomers answer a simple rule question, and failures can retry or go to review.

For marketplaces, tenant groups, private communities, or job boards, use a form or questionnaire. The user submits details, and admins approve or reject from the queue.

Optional checks such as channel or group subscription should only be described where Telegram API rights make that check possible. Do not describe VibeGuard as reading private Telegram signals it cannot access.

If your group uses Telegram join requests, VibeGuard can help admins review newcomers before approval.

A cautious join request setup can send risky newcomers to a queue, challenge them with CAPTCHA, ask for rules acknowledgement, or require form review. Admins can then approve, challenge, decline, or open a case when the situation needs more context.

For higher-risk groups, connect join request review with anti-spam, anti-raid, and threat intelligence signals. For example, a newcomer with suspicious first-message behavior or known local risk can be challenged or routed to admin review instead of being handled blindly.

Join Gate works best when admins know what state each newcomer is in.

Pending means the user joined or requested access but has not passed checks yet. Challenged means VibeGuard issued a CAPTCHA, rules acknowledgement, quiz, or form. Verified means the user passed the active check and can follow normal group rules. Quarantined means the user may remain limited or visible only in an admin queue until review. Rejected means the join request was declined or the member was removed. Bypassed means the user skipped checks because they are an admin, trusted member, allowlisted user, or otherwise exempt under group policy.

Keep bypass rules narrow. Admins, known moderators, or trusted roles may need exceptions, but broad bypass lists make join gate protection less useful.

Newcomer policies can be stricter than normal member rules. During a configurable newcomer window, admins can limit links, media, forwards, bot-command noise, or fast first-message behavior.

Use this carefully. A creator fan group may have normal bursts of excited stickers. A marketplace may need stricter first-post and link rules. A crypto group may want stronger checks around suspicious links and fake support patterns.

VibeGuard should help admins separate normal new-member behavior from risk. Start with review, then enable delete, restrict, kick, decline, or case creation only where the rule is trusted and the bot has the required Telegram permissions.

After Join Gate is running, review events in Security Center.

Check who was challenged, who passed, who timed out, who was approved, who was declined, and which actions failed because of missing permissions. Look for false positives. If real members are getting stuck, loosen the challenge, extend the time limit, or route failures to admin review before using stricter actions.

Join Gate should reduce chaos, not create a second moderation job.

Troubleshooting:

Problem: CAPTCHA appears, but VibeGuard does not remove failed users. Fix: Check whether kick, decline, or restriction actions are enabled and whether the bot has the required Telegram permissions.

Problem: Join request review is not working. Fix: Confirm that the group uses Telegram join requests and that VibeGuard has the relevant approval permissions.

Problem: Real members are failing verification. Fix: Extend the challenge time limit, simplify the CAPTCHA or rules acknowledgement, and send failures to admin review before enabling stricter actions.

Problem: Channel subscription checks are unreliable. Fix: Confirm that the linked channel or group can be checked through available Telegram API rights. Use rules acknowledgement or CAPTCHA if subscription verification is not reliable.

Problem: The group is still getting first-message spam. Fix: Combine Join Gate with newcomer policies, anti-spam filters, sender-chat guard, and first-message review.