Who’s knocking on the door?

Who's knocking on the door?
There was someone ringing our doorbell the other day. Who is coming announced like that??

It was a lady from the hygiene department on a control visit.
Are we going to have to close down for a while until all issues are resolved?

NO Way.
No negative remark or proposal for improvement (and she left 9 pages behind).
thought you may wanna know.....