Surrey milkman

This milkman delivered eggs to the Dursley family in 1991.

He was said to be very confused when he had to had the eggs to Petunia Dursley through the window of 4 Privet Drive, after Vernon Dursley had boarded up the cracks around the front and back doors of the house so that nobody could go in or out.

Each of the two dozen eggs contained a Hogwarts acceptance letter rolled up and hidden inside it.