"My wife is earning and is currently employed in some company :-" i.e. If anyone is working and has some salary above some amount and that ORG is deducting PF, then, its easy to prove.
If person abc is working in xyz org, which is bound to pay PF of employees then , https://search.epfoservices.in/est_search.php This is place, you can search for xyz org and that will list down all names under than Org, for whom xyz pays PF to PFO.
Simply, get all names and if person abc is employed in xyz , that name will be listed then take printout of same and show in court !
but, if this is BIG proof that abc lied on oath in court, then check with seniors, when to take action.
As this is serious issue and perjury can be filed if handled properly...
ps: take any decision at your risk... updating in public interest..