Earlier this week, some users reported that American Express was blocking transactions from the Pepper app, but we’ve since heard that the issue with paying via Amex card has been resolved.
A few days ago, Pepper users were reportedly getting an error message when trying to buy gift cards saying that their transactions had been declined by the issuer. The problem had been limited to Amex cards and apparently all Amex cards were being declined.
On the one hand, that’s a surprising development given the fact that there was an Amex Offer for Pepper transactions that ended just a few days ago, but on the other hand it seemed like it could have been within the realm of possibility that Amex would block gift card transactions.
The good news is that we’ve since heard that the issue has been resolved and that Amex cards are once again working for purchases via Pepper. It seems like this was likely a temporary glitch that has been resolved and it seemed worth a quick alert to any readers whose transactions had been declined earlier in the week.

Are Pepper and Amex going to re-offer the Amex Offer that expired during this “glitch”?
It’s time to photoshop the top-left part of the Pepper-app.png, multiplayer is 0X for Amazon, since it’s not available anymore (only available for the points redemption)
The glitch is back. Not working for me to purchase gc with Amex card already in Pepper wallet and cannot add Amex card to wallet.
Anyone know if the merchant code is unchanged for amex purchases at pepper? Thanks.
Yeah, not working for me either. I can’t add a card
I’ve never been able to use Amex cards. Amex claimed the issue was with Pepper, and Pepper blamed Amex. So that website is useless to me.
Mine is still not working with Amex btw.
No fact checking at all here
I agree, and why is there no statement of exactly who (officially) has said this has been resolved…
I was experiencing (what I think was) this same issue back in December, only an Amex cards. Visas and Mastercards from other banks were working fine. Talked to Amex chat, who indicated that Amex was not even receiving any transactions from Pepper to authorize.
Tried again a few weeks later and it worked.