do a survey to verify clients
I have received two spam clients, specifically looking for funding when their contact project is one of a full fledged project. Perhaps if a simple client survey that asked a few questions, like start up or established company, looking for funding or have funding, and timeline regarding inquiry would be so helpful. Personally, I have spent several hours in discussion with zintro recommended project clients only to find that one was a total scammer just looking for funding for a project that may or may not be valid and the other pretended to be one thing and in the end wanted funding to research feasibility of a project.

Thanks for the feedback,
We are constantly working to build relationships with clients. You will now find the Verified Client badge in inquiries and email notifications that indicates that we have an active relationship with the client and indicates seriousness.
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Roberta commented
I agree with a having a client survey to help weed out scammers. I have been contacted by those who only wanted to use my contact information and reputable industry name to give their company credibility. In other words, their goal wasn't actually to hire me-it was just to get me to sign an agreement that gives them the right to use my info to promote their business and say that we have a business relationship (even though we don't).