Owners of Seven Mile Beach Kiosk in Gerroa, on the New South Wales' south coast, have put up a sign which is not only encouraging customers to be more polite, but it is putting a smile on their faces.

For about two months, the sign which reads 'A coffee: $5, A coffee please: $4.50, Good morning, a coffee please: $4' has been greeting coffee drinkers.

Owner Kev Chilver said he and his wife, Kylie Pickett, wanted to bring back good manners after one of their employees saw a similar sign elsewhere.

'Common courtesy is ... becoming less and less common, and we're trying to bring it back,' he told Daily Mail Australia.

'We are in service industry but we’re not servants. We deserve as much respect as anyone else.

'Please and thank you go a long way.'

Mr Chilver - who has owned the kiosk with Ms Pickett for four years - said reactions to the sign had been good.

We have some people who try it on and say "please", thank you" and "have a nice day" and then "Can I have it [coffee] for three dollars?".'

Chef Megan Jones said people were going out of their way to be nicer.

'People tended to come in and say "Coffee thanks" and there was no "Hi, how are you?"'

But Mr Chilver said they did not go as far as enforcing the sign.

'It’s just put up there as a gimmick to cheer people up. We never enforce it,' he said.

'We couldn't take it that far.'