Give access to attachments to the driver as images or pdf documents. Attachments can be linked to the order via the API and notes can be added to Order. In the driver app, any delivery with attached notes for the driver will display an icon, and the driver can download/view the note. This gives the driver visibility ahead of time if there is any specific instruction attached.
These notes could include instructions on how to find a specific building or gain entry to the delivery point.