> ## Documentation Index > Fetch the complete documentation index at: https://research.verifyyou.com/llms.txt > Use this file to discover all available pages before exploring further. # VerifyYou for research > Verify that each response comes from a real, unique human, automatically.

HumanCheck

Verify every response is from a unique human

HumanCheck locks bots and repeat humans out before they ever reach your study.

See how HumanCheck protects studies

Samples you can defend in peer review

Verify each respondent is a unique, present human to ensure data quality.

Download one pager

How it works

1

A passcode per human

Each verified respondent receives a one-time passcode, created for their face alone and dropped onto their link. It fills itself in at your study's gate.

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2

Fakes locked out

Bots and returning humans get locked out. A duplicate face never earns a second passcode, and a spent passcode is dead forever.

Into the study
Blocked
Same face, second try
3

Pay only for real

You only pay for real, first-time respondents. Blocked traffic never enters your data and never gets paid.

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rsp\_78422Blocked
They click your study link
The live face check, real product Five-second face check
Verified humans Into your study
Bots and repeat humans Blocked

Your setup

1Create your study

In any survey platform, exactly as you normally would.

2Add it to a verification

Two minutes in the VerifyYou dashboard. It mints the one-time passes for your study.

3Share your study link

Everyone who reaches your questions came through the check.

Built by humans from

GoogleRedditPinterestLinkedInAirbnbRobinhoodAccentureQuoraGoogleRedditPinterestLinkedInAirbnbRobinhoodAccentureQuora

Start here

Walk through it in order

1 How it works 2 Researcher setup 3 The respondent experience 4 The same mechanism, any platform

HumanCheck on Alchemer

Protect your study

A one-time password per verified human, enforced by Alchemer's own gate before your first question.

1
Create
2
Gate your study
3
Field it

Common questions

The questions researchers ask first

The check takes a few seconds, once. Verified respondents land in your study with the password already filled in, so there is nothing to type and nothing to remember. Most of what a check turns away is the traffic you did not want anyway. No. A blocked respondent never receives a password, never reaches your study, and never becomes a complete. Nothing to pay, nothing to clean out of your data. Sharing gets them nothing. Each password works exactly once, so a forwarded link carries a spent password, and the same face can never earn a second one for the same study. See [why it works](/how-it-works). No. No photo is shared with you or with Alchemer, only a yes or no. Your study receives a verdict and a password, never a face, a name, or contact details. No, and it is not trying to. It proves the person is real and unique, not that they answered carefully. Keep your speeder and attention checks; this closes the door they cannot close. A password is spent the moment it opens your study's gate, not at completion. If someone starts your study and abandons it, that password is gone, and because the check recognizes their face, they simply receive a fresh one on their next visit. Honest respondents are never locked out of a study they never finished.