Why write Polite Notice on a sign?

1. What does polite notice mean?
2. How do you spell polite notice?

What does polite notice mean?

In a very British way, Polite Notice is equivalent to: To whom it may concern: I am about to ask a favour, but before I do, I want to make you aware that I do this without aggression, blame or reference to any other occasion.

How do you spell polite notice?

Drop a hint without the awkward conversation with this polite notice.