It can sometimes take a couple of days for your package to change from pre-shipment to package acceptance. Once the label is printed, then it enters the pre-shipment status. It might take a day for the package to be delivered to the collection site and then another day or two to get scanned. Hence, it might seem stuck in this status for 3 or 4 days. Most of the time, there is nothing wrong. If it sits in this status for longer than 5 days, then go ahead and contact customer service.