# When does ZeroTwo ask me to complete a CAPTCHA?

> ZeroTwo shows a Cloudflare Turnstile check on the web sign-in page for email and phone sign-in, and nowhere in chat. Here is what to do if it will not clear.

Source: https://help.zerotwo.ai/en/articles/8184038-when-does-zerotwo-ask-me-to-complete-a-captcha
Section: ZeroTwo
Last updated: 2026-10-05

ZeroTwo uses one CAPTCHA: a Cloudflare Turnstile check on the web sign-in page. It can appear when you sign in with an email address or a phone number, and only there. You do not meet it while chatting, and the sign-in screens in the iPhone, iPad and Android apps do not include it.

## When it appears

1. On the sign-in page, type a full email address, or choose **Continue with phone** and enter a complete phone number.
2. The check appears beneath the field. Complete it.
3. Select **Continue**. Until the check is complete, the button stays disabled.

If the form is submitted without a completed check, the page says "Please complete the captcha to continue." The check also resets after each attempt to send a link or code, so every new attempt needs a fresh check.

**Continue with Google**, **Continue with Apple** and **Continue with Microsoft** do not show it. They run a separate background check instead, described in [What does "Unusual activity detected" mean when I sign in?](https://help.zerotwo.ai/en/articles/10471992-what-does-unusual-activity-detected-mean-when-i-sign-in).

## If it will not clear

- **No check on screen.** It appears only once ZeroTwo accepts what you typed. Make sure the email address is complete or the phone number has all its digits.
- **The check expired or failed.** ZeroTwo clears it and keeps **Continue** disabled until you complete a new one.
- **"Captcha verification failed. Please refresh and try again."** When you sign in by email, this means ZeroTwo's server did not accept the check. Refresh the page and start again.
- **Still stuck.** Use another sign-in method. See [Why does ZeroTwo say SMS sign-in is not available for my number?](https://help.zerotwo.ai/en/articles/8983035-why-does-zerotwo-say-sms-sign-in-is-not-available-for-my-number) if phone sign-in is what blocked you.