Dear Pranab,
In today's digital era, different online tools are available for past employment verification of potential employees. You can verify your candidates' employment records on your own, that too in less time and without spending any money.
One of the reliable online tools for past employment verification, the one that I personally use, is Verified Resources. It asks for factual information, such as last withdrawn salary of candidate, his/her work experience, status of exit formalities and whether he/she served the notice period or not. After taking into account all these details, it delivers quick, accurate verification reports.
You can analyze these reports to make right hiring decisions. This is the link for Verified Resources
www (dot) verified resources (dot) com
Thanks
Meesha