IshopFood works with the best-rated partners to ensure the best experiences for our users, here we use Here API for the selection of a delivery area, however, due to the fact that a map is constantly evolving, it It may happen that a customer wants delivery to a new area or street, not yet appearing on the map.
In this case, a situation of unknown address may arise, and may block the user when ordering:
It will then be necessary to prefer the configuration of the zone by postal code as below:
Enter a postal code (that of the customer who may be unable to order following a card modification for example) in the field provided for this purpose, then save :
Well done, your customer is now able to order with his address!
Create an area using polygons
Isolate the address on the map, and surround the address using polygon points, you can adjust the points, and the area by dragging the points on the map and releasing the click at the desired location:
Click on the "Create new zone" button and save. 
The address / zone is then available for delivery.