On my site, I have an Application on my site that requires applicants to verify their ID before they can even apply for a membership! Scam Artists will tend to try to provide the minimal information which will not authenticate in our system, therefore they will be blocked (by IP Address) and denied membership forever! Ask for references and testimonies to authenticate the business Identity, ie, Registration of Business, Tax ID, Social Media, etc, to see if they are even a legal entity that is capable of doing business in your state!