When the customer orders through the website they will receive an order number. We will use this order ID to identify the pick-up in the store as well. We don't want to make 10 different numbers, so the identification of what order to give to the customer is simply the order ID that is connected to the order.
When the rider arrives, the rider will hand you the order number that he has in the app. You should identify if the ID matches with the order in your system. The rider will eventually ask if there is a matching amount of orders in the bag.
You can now hand over the order if the order ID matches with the order ID that the Rider gave you.