These notes left for milkmen came from the UK, so you'll notice a slight, endearing British ambiance to them.
"Dear Milkman, I've just had a baby, please leave another one."
"Please leave an extra pint of paralyzed milk."
"Cancel one pint after the day after today."
"Please don't leave any more milk. All they do is drink it"
"Milkman, please close the gate behind you because the birds keep pecking the tops off the milk."