DOB is routinely used by credit card companies and banks for ID verifictaionon telephonic calls.I certainly would not at all be keen on sharing the same to any anonymousphone caller.You may think of another modality to identify, if this MISUSE is actuallysuch a big and un-handlabale issue.regards,
Dr Atul AdaniyaSir H N Hospital & Research CentrePrathna SamajMumbai 400 004