Drivers are only encouraged to accept "Cash on Delivery" if they have enough change for the customer. It is possible for the drivers to find themselves without enough change to give back to the customers if they make a mistake. DoorDash's protocol in this situation is to inform the customer first. As a result, they cannot hand over the delivery to the customer, but must return it to the restaurant. They must contact DoorDash support and request another delivery. Drivers can be suspended from receiving "Cash on Delivery" orders if this occurs too frequently.