Form spam fills your inbox with junk and hides real enquiries. A few measures stop most of it.
Methods that work
| Method | How it helps | Impact on users |
|---|---|---|
| Honeypot field | Hidden field bots fill in | None |
| Invisible CAPTCHA (such as reCAPTCHA v3 or Turnstile) | Scores visitors in the background | Minimal |
| Time-based checks | Blocks forms submitted too fast | None |
| Field validation | Requires a valid phone or email format | Low |
| Spam filtering plugins or services | Filter known spam patterns | None |
| Visible puzzles | Blocks bots | Annoying; use only if needed |
Start with invisible methods
Honeypots and invisible checks stop most bots without bothering customers.
Validate phone numbers
Require a 10-digit Indian mobile number format where appropriate. Clean collected lists with our phone number cleaner and email list cleaner.
Check that real enquiries still arrive
After adding protection, test the form yourself and check spam folders.
Human spam
Some spam comes from people selling services. Filtering keywords can help; otherwise simply ignore it.
Read contact form best practices.
Want the full picture? This article is part of Business websites: the complete guide, our in-depth guide with everything in one place.
