FedEx drop off centers do have restriction's for interline employees during the Xmas holidays. Usually, there's a time in the morning and afternoon that you're not allowed to ship(normally the first hour of business and the last hour). Also, you probably should ship packages at least 1-2 weeks out from Xmas to have a fighting chance of arrival on time since all interline is space available. Check your local center for their restrictions...normally posted on the door as you walk in.