Annie, couriers do not check every parcel they pick up...they just don't have the time.

My OH does pickups from places like the ATO and the Passport Office where they can have multiple items which are in flash bags....the driver never looks the individual addresses on the parcels.  They just scan the barcodes and make sure that there are Con Notes to match each one.

The driver does not have the right to refuse to pick up anything that has been booked with the company...all they are responsible for it picking it up and taking it back to base to be delivered by the driver in that area.