Shipping is tricky, but as someone go has worked at medium and large firms, I know what I'd do. Ship to some random company using their street number, with a fake recipient name. Walk in to the reception, explain that you addresses something wrong, show a fake ID and get the parcel. The number of issues with stuff being posted, misaddressed etc are huge at a decent sized company. There are always random parcels sitting around, couriers collecting, swapping, and delivering. I'm sure this isn't foo proof but its what I'd do.