Cannot. Identity can be faked.. so best is don't conduct any check at home coz nobody can be trusted. U open door to ppl later that person become scammer , other ppl say u stupid.

And the victim already say no kad kuasa shown. Just show the emblem.

Didn't follow sop from victims point of view.

Once taken using my camera, meaning it's my copyright. Not your copyright. Hahah. So whatever I do u don't complain. That's our mentality.

Id can be faked. So best is deny entry to all personnel. Police also no right unless got warrant. But warrant could be fake also.

If they show ic also could be. Why not. So many fake ic. In short anything meet at Balai polis.

If that person is in your compound? U take photo?

So who intrude whose privacy?

Tats why better don’t use fb. We tend to do things we could not imagine the consequences.