I've encountered issues multiple times with McDonald's franchisees not accepting mobile orders, or having out of stock menu items and they are still charged. I've experienced double billing/billing for items not received, etc and there is no way to dispute charges expect with the individual franchise and if they pull the "we don't know how to work with mobile orders card" then it's just a SOL situation where I pay extra. I generally try to avoid McDonald's as my choice because of this issue.