And only after the person has entered

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When a user clicks on the checkbox, the site checks the reputation of his IP. If everything is OK, the data he entered in the form is sent to the database. If the reputation is in doubt, he is asked to enter a captcha. the correct characters, he can send the data.

Invisible reCaptcha

It works on the same principle as reCaptcha, with the difference that the user america phone number list does not need to click "I'm not a robot". His "humanity" check begins when he clicks the button to send data. The fact that invisible reCaptcha is working on the site can be seen by a small tile with a logo somewhere in the corner of the page. For example, this is how it looks on Avito.

Use LeadPlan
The vast majority of spambot protection services protect forms that are already displayed on the page. For a robot to fill in the fields and click "Submit", the form must be on the page. If it is not there, then there is nothing to send, which means the bot will leave the site in search of a new victim.

LeadPlan, even when opening the page, by checking the IP and the script, which we will discuss below, determines that the client is a bot, and simply does not load the form for him. And if the client is a person, then it loads in the usual mode.

When the user opens the site, a check is launched for: