Earlier this year, Bangalore-based Toyoto Kirsloskar Motor (TKM) went through a similar experience.
In January, the personnel department got a complaint from a victim and both filed a police complaint.
The police nabbed a job offer scam network run by a Nigerian national in Delhi.
"For every complaint that comes up, there could be hundreds of such cases which go unreported," says Shekar Vishwanathan, deputy managing director, TKM.
It has put out public notices in national newspapers and on its website; staffers have also been urged to spread the word.