Thank you for your responses, everyone.
MC: This customer has rejected the idea of calling with a message as bad marketing!! In my experience marketing people have their own “logic rules” and I can never follow their thinking. And yes, they have 30 customer sales reps calling these “leads” all day long. They claim 1/3 of the leads have invalid phone numbers. My customer suspects fraud and that someone is submitting false leads to boost their lead rate and fees.
Ken: I am not sure we have any language in common – lol. Where can I learn what “ASR and ACD” are? I looked up lidb and lnp already!
Also, the cost of a call compared to the cost of a fraudulent lead (over $20) is insignificant.
The ideas I have suggested to my customer, for what it is worth, are comparing the State (we are in US) for the IP address of the submitter, to the State on the form and the State of the area code on the form. In the situations where they do not agree, prompt the user for permission to robo call for verification.