Exactly. Staff id KKM takde ke?

I remember many years back when I was a kid, whenever gomen staff wana come do check up or survey, they'll first send letters house to house informing the date government ppl will come and for what purpose. Yes that includes the drs, MA (aka dressar) and nurses. On that appointed day they'll show up complete in uniform and ID card.

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.