From time to time, unfortunately with any form on a website, "robots" or real human spammers sometimes penetrate and submit spam messages through the forms on your website directory. 

It's best to just delete these requests and focus on the leads that are legitimate. Adding additional security measures may confuse and hinder real people from completing the forms, so we recommend this protocol when viewing spam leads that are submitted via your directory website. If the problem is chronic and persists, that would be a good time to explore adding additional security captcha tools on the forms.