there are many ways to verify,
like calling your friends in the current company of candidate to verify
like calculate & esimate candidate's current pay & how desperate are them based on CTOS statement
like telling candidate to login bank / epf account show you the history of the amount credited

only lose job when found out get called out in internet,
but no worries malaysian all beta one most of the time they just suck it up
if u do it few more times u get promoted for saving money totally worth it