I can imagine a near future of driverless vans going all around the city with packages. They show up at your door (or wherever you are) and you get a code on yo

I can imagine a near future of driverless vans going all around the city with packages. They show up at your door (or wherever you are) and you get a code on your phone. You enter the code on the van's door. It unlocks and you pick out your package. The problem would be making sure that people can easily find their packages, and that they don't steal others' packages (which would be easy to check)