reCAPTCHA on your landing pages
When you buy traffic, form spam is more than a nuisance: it's a line item. Every scripted submit is a click you paid for, a lead your buyer will return and, if it counts as a conversion, a signal that teaches the ad platform to find more of the same. LanderLab supports both versions of Google reCAPTCHA, so the forms on your pages check each submit before it becomes a lead.
There's no code to add: your keys are saved to your LanderLab account once, and the protection applies to the forms on every page you switch it on for. Version 3 suits most lead gen pages because the visitor never sees it. Version 2 is there when you want people to see that a check is in place.
reCAPTCHA v3 or v2 on your landing page forms
Version 3 runs in the background and scores each visitor from 0.0, likely a bot, to 1.0, likely a person. LanderLab verifies the token on its server with your Secret Key, and submits that look automated are blocked silently. Real visitors fill the form exactly as before.
Version 2 adds the "I'm not a robot" checkbox to the form. Most people pass with one click, and Google adds an image puzzle only when a visitor looks suspicious.
A bot costs you twice
You pay for the click whether a person or a script is behind it. If the script then fills the form, you pay again: the buyer returns the fake lead, or it counts as a conversion and the ad platform goes looking for more traffic like it. Keeping bots out of the form keeps both your lead count and your campaign's learning honest.
It also keeps your own numbers straight. LanderLab's conversion rates per page and per variant are only useful if the submits behind them are people, and a split test decided on bot traffic is a test you'll have to run again.
Which version fits paid traffic
On a multi-step or two-field form, every extra tap costs completions, so v3 is the usual pick: real visitors see no widget and the form behaves as before. Use v2 when a buyer or a client wants a visible check, or on a page that keeps getting hit and you'd rather make every visitor click once.
You can run different versions on different pages, so the high-volume lead page stays frictionless while the giveaway page that attracts form bots shows the checkbox.
