What is the address to mail in a payment for the Apple Card?

You should be aware that mailing-in a payment is considered a “non-conforming” method under the terms of the AppleCard agreement.

As such, it may, or may not be accepted. Or it may be accepted but not posted in a timely manner.

The agreed-to methods are at Related Article link.

Apple Card agreement is available here:

https://www.goldmansachs.com/terms-and-conditions/Apple-Card-Customer-Agreement.pdf

You can pay by check, but be aware of the due date of your Apple Card account, the last day of every month. Mail delivery can slow down delivery of checks and there other options available to you by linking your bank account(s) to your Apple Card account. You can also pay online,

CONTACTING — Goldman Sachs Bank 

• Using Messages; chat with an Apple Card specialist

• Call toll-free at 877-255-5923; or

• Write to: Goldman Sachs Bank, Lockbox 6112, P.O. Box 7247, Philadelphia, PA 19170-6112.

You’re welcome to Message Apple Card Support Team and verify the mailing address and other payment options.

How to make Apple Card payments - Apple Support

As I suggested, they can chat/message the Apple Card Support Team at Goldman Sachs and confirm what I’ve written. You to can confirm my statements by chatting/messaging the team and be assured that they will accept a check. 😃

I'm not at all challenging any of your statements or very helpful suggestions.

Regret any inference otherwise.

And FWIW I've performed a few "non-conforming" payments myself; all w/o ANY issue or delay.

Just wanted the OP to be fully apprised as to "where they stood."