> For the complete documentation index, see [llms.txt](https://docs.powerfulform.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.powerfulform.com/~/revisions/zH3ocLtRhbVvMmUZwFWl/trouble-shooting/prevent-spam-submissions.md). # Prevent spam submissions ### ✅ 1) Enable reCAPTCHA (Recommended) reCAPTCHA helps block bots before they can submit your form. **Google reCaptcha** is a free service that protects your website from spam and abuse. [**Google reCaptcha** ](https://globosoftware.net/kb/how-to-add-google-recaptcha-v2-to-your-form/) uses an advanced risk analysis engine and adaptive CAPTCHAs to keep automated software from engaging in abusive activities on your site. It does this while letting your valid users pass through with ease. Guide for reference: [Add Google recaptcha](/~/revisions/zH3ocLtRhbVvMmUZwFWl/app-integration/google-recaptcha-integration.md) *** ### ✅ 2) **Limit one customer one submission** You can restrict users to a single submission based on their email address or phone number. Guide for reference: [Limit one cutsomer one submission](/~/revisions/zH3ocLtRhbVvMmUZwFWl/some-features-guide/limit-to-one-submit-per-user.md) *** ### ✅ 3) **Block email domain** The app allows users block domains in pro plan.