First off, what do you think you can find out about a foreigner here?

Beyond their immigration status there isn't anything as a JMB you can find out.
Credit checks? Most likely if they are crooks they live under the radar of CCRIS/CTOS.

Reference checks? These can very easily be forged for tenancy purposes.

Also what are you going to do if the following happens?

Owner overseas. Gives it to the care of a managing agent. Agent finds a tenant who is an agent for foreign tenants, everything checks out perfectly because the JMB would not have known that person is an agent, after 2 weeks a bunch of Africans moves in and assumes the tenancy? What could have your background checks have done to prevent that?
Absolutely nothing at all.

As a JMB chairperson, I can tell you any type of system you can think off there will be a way to circumvent it.

I will give you these advice :-

1) You can't do everything on your own. Does not matter whether it is a RM100psf junk grade condo or a RM2000psf elite condo, unless you have people on board with you nothing will happen.

2) They say when it comes to cars it can be fast, good or cheap pick 2. When it comes to a strata development the JMB can have 3 aspects which are cheap, great in maintenance or great in security, you will have to choose 2 to pick. You want great maintenance and great security? Sure no problem, maintenance fees must go up. You want great security at a low cost? Doable, just you have to cut down on other things such as maintaining the lawns or facilities for example.

What I see is if your development is having issues with crime then initially invest more in security, more CCTVs, more security guards, more patrols by security guards. Stricter visitor controls. But first and foremost make sure accounts are up to date, go after those that don't pay and don't give too much leeway.