This tool allows authors to verify purchase codes after receiving them from their buyers to check if they purchased an item or not.

Verify the age of the customers landing on your WordPress website with the WooCommerce age verification plugin, Agy.

Gravity Forms Email Verification is a great way to verify or authenticate your users when they submit a form.

WooCommerce Email Verification is a WooCommerce addon to generate account verification link on user registration.

Kids shouldn’t be allowed to browse adult content so easily. You need to protect yourself from the law (drinking age in US is 21), and the kids as well.