Do we have to return the old Apple Card after getting the new one?

No you’re not required to, but both Apple and Goldman Sachs would like you to do the right thing.

Please follow this link,

Apple Trade In - Apple

Select — Other Products

Tap Blue Recycle Button

Select from Drop Down — Apple Card

Select — tap Blue Recycle Button

Fill in name, address and shipping information

Select — tap Blue Finish Up Button

A prepaid mailer will arrive in a few days for you to use for shipping to recycler.

Thank you for recycling.

You can keep the old card if you want but returning it is an easy way to dispose of it and have it recycled.