This happens all the time. For the customer, they'll get a refund if it's the first time it's happened to them, but if it keeps happening then they'll likely be denied refunds after a while, as support will assume the customer is lying to get free food (unless they submit doorbell cam footage, which they often do). For the driver, nothing will happen to them, but if customers keep reporting their food as stolen then eventually the driver will be removed from the platform, as support will assume the driver is stealing.