Why courier already comes to warehouse even though we are still packing the order?

In the current process of order picking, once the order has been picked confirm, then the 'Ready to ship' status update gets triggered to Marketplace, which the marketplace integrated courier gets the order pickup update, and courier will then go to the warehouse to collect the order. Another possibility is that courier goes to the warehouse at stipulated time for daily collection of orders as per pre-arranged between you and the courier. 

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