# Captcha for chat members ### What is a "captcha" for Telegram and why? We in Fullyst use the "captcha" term features to check if the user is a human or a bot. So it's not only about the fuzzy text on the image but a bit more complex. Currently, [@FullystBot](https://t.me/FullystBot) has two types of captcha. #### Button It is the simplest method to solve and you can pass it in one second. All you need to do is click the button "I'm a human!" within 1 minute.

Button captcha in action

After clicking the bot message will disappear and you can start (or continue chatting). #### Math Math captcha requires some skills: you need to be able to solve a simple math problem like "23-8, 17+2, 5+13". You will have a limited number of attempts, so be careful, because if you reach the limit, you will be banned from the chat and only chat's administrators can unban you.

Math captcha in action

If you choose an incorrect solution, the math problem will be regenerated and you will see the new problem and new solutions, so you won't be able to go through all five options and bypass the check (but you can use a calculator if you want!) ### Q & A When all chats start using the captcha, will I have to go through it multiple times for each chat? > No, not really. If you confirm that you are human in one chat it will confirm you for all chats across @FullystBot, but ыome chats will be able to include a unique verification option, in such chats you will have to re-verify that you are a person. Why is the "captcha" needed? > Unfortunately, along with the growth of the Telegram Messenger, more and more spam bots appear, so chats administrators who want to keep chats clean from spam turned on the "captcha" function. I joined the chat but the captcha message from @FullystBot disappeared and I don't have enough time to confirm myself! What should I do? > Don't worry, just write any message to the chat and the captcha message will be send again. Unfortunately in this case your message will be removed, so you will need to send it again. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.fullyst.com/features/captcha/captcha-for-chat-members.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.