I had a wellness check once. I could have murdered the psych that called it on me because it was completely and utterly without cause.
So, they got to my apartment; they needed to come in and look around. I kept calm and was a good hostess - one stayed with me, asking questions related to the call for the check while the other walked through the whole apt looking for anything wrong.
Then, the one who had been looking talked to me while the other called back the psych who had initiated it.
He put me on the phone w/psych, I told psych I was ok, phone went back to cop, cop asked psych if I was ok.
I think psych said yes, because at that point they said they could leave.
It took about 20 minutes altogether.