... Always Ring Twice?

When my father drove to town to shop at nearby Ikea, he also planned to swing by and perform some minor Mr. Fix-its at our flat.  

As he was leaving Ikea, he phoned to say he was five minutes away. Sure enough, five minutes later our buzzer sounded and I let Papa into the building. I opened our door, and when the familiar ring of the lift reaching our floor sounded, I warmly shouted out,

"Hallo! Magst du etwas frühstücken?" (Would you like some breakfast?)  The chuckling postman handed over my box from Amazon. "Unterschrift, bitte..." - Sign here please...