Refund of Trade-in to Apple Cash Card?

The trade in goes to the purchase of a new Apple device or an Apple Gift Card if you are not ready to purchase, and the Gift Card is only able to make Apple Purchases. The Gift Card is not able to be redeemed for cash. So no, the trade-in value would not be able to go to your Apple Cash card.

The 3% Daily Cash will be on the purchase price after the trade-in value is removed. Generally, the value received for a trade-in is in the form of an electronic Apple Gift card. I don’t think Apple’s trade-in partner has access to Daily Cash or any other means than gift card.

How much later do you want to trade in the iPhone, days, weeks, months? Have you looked at carriers for their solutions?