The shipping kit, to return the trade-in, will be timed to arrive soon after (within days) of receiving your new device. This is done such that you will have adequate time and opportunity to transfer (should you choose to do so) all data from your old to new device.
The shipping kit will include:
- return packaging/shipping container
- a return (shipping paid) return label
- instruction leaflet
These items may be sent to you in a plastic shipping envelope; be sure to check that all items are accounted for before discarding the outer wrapping. In some regions the shipping container will be mailed without an outer wrapping; in such instance, the return shipping label will be beneath the address label that was used to send the shipping box to you.
If anything is missing, contact Apple Support using the contact details included within your order confirmation.
Before returning your old device, you must prepare the device before packing as follows
What to do before you sell, give away, or trade in your iPhone or iPad - Apple Support