Trade in

I have an iphone to trade in. I want to preorder the new iphone 12 pro max. The phone expected to arrive between 24/11/2020 - 01/12/2020. That's about 17-24 days. The trade in program on the website said that I have to send my old phone in within 14 days. I need my phone until the new phone arrived. Can i send in my old phone when the new phone arrived and still get the trade in value? That will be after 14 days once i placed my preorder.