Nothing Worked Anymore with Mastercard

Micha · August 15, 2026 at 12:07 PM

Actually, today is just a completely normal Saturday, but the day got off to a bumpy start ...

Every weekday morning, I stop at the local gas station, buy my breakfast rolls and suitable drinks to go with them. I always pay with my Mastercard.

This morning I was there again, but this time to fill up. I filled the car up, wanted to pay, and all I got from the terminal was the message "PIN incorrect". Huh? That can't be right—did I type it incorrectly? Entered it again ... PIN incorrect. Now I was getting worried, so I checked the PIN again in my banking app—it was the correct one. Tried it once more, payment declined, card blocked.

Fortunately, I can unblock the card myself, so that's not the problem. But nothing was working, and I didn't have any cash. So first I had to fill out an "IOU" at the gas station and head to the nearest ATM. The card was already unblocked again, I changed the PIN as a precaution, and the ATM said "The transaction could not be completed".

Great, I don't like being in debt. I initiated an instant transfer to my better half—no problem, it went through. The plan was now to withdraw the money with her card, and what appeared on the display? "PIN incorrect," while the app showed the usual warning message. This really can't be happening.

So the "piggy bank" was slaughtered, and that was used to pay the gas station. The whole ordeal cost me three hours of my life!

Now I still had to do the weekend grocery shopping. Fortunately, there was enough in the piggy bank, at least for the essentials. So I loaded the groceries into the cart and headed to the checkout. I told the cashier, "We'll try paying by card first, but something seems to be acting up." His reply: "Yeah, we've had that happen a few times earlier, too." I pulled out the card, paid, and no PIN was required (although it should have been requested as confirmation of the change); the amount was debited—everything was fine.

Now it was time to go to the ATM with my better half once more to put the money from my transfer back into the piggy bank ... no such luck—wrong PIN again.

After returning home, I did a little research ... aha ... the outage was on Mastercard's end (see graphic. Source: https://www.netzwelt.de/ist-down/797-mastercard.html)

That's a really annoying situation that, to be honest, I don't want to find myself in again. So I quickly ordered a Girocard as well. This one from the other bank, too, just in case that bank ever goes down as well.

I travel away from home a lot—it would have been a real problem if this had happened farther away. I guess I'll start stashing a bit more cash again, just to be on the safe side. I actually wanted to say goodbye to cash completely. But no ... better not.

Micha · August 15, 2026 at 6:06 PM

It seems to be working again now. But this just goes to show once again—it’s better to have some cash on hand, too.

PixelPaule · August 17, 2026 at 1:27 AM

Ugh, that really was the full-on card zombie apocalypse 😅 First the PIN was wrong, then the card got blocked, the ATM stopped working, and in the end contactless suddenly worked again at the checkout. You really feel completely helpless, even though the account is actually funded.

I always keep a few bills in my wallet now too—not much, but enough for gas and a small grocery run. You only realize how dependent you’ve become on technology, bank servers, and all kinds of terminals when you’re paying by card. Three hours because of something like that is quite a hassle, though… hopefully the gas station’s IOU was at least straightforward.

LootLara · August 18, 2026 at 2:27 AM

That really was the complete chain of errors. If contactless payment was used at the checkout, it can indeed go through without a PIN, even though the PIN check had previously failed at the ATM. It sounds a bit like an issue with the bank or the Mastercard backend rather than an actually incorrect PIN. But the fact that both cards were affected is pretty annoying.

I now also always carry 50–100 euros in cash, plus a second card from a different account. Not because I want to go back to the Stone Age, but because at the gas station or during the weekend grocery shop, it’s hard to say, “I’ll come back tomorrow when your servers are awake again.” 😄 Relying solely on phone payments probably wouldn’t be a reliable backup in that situation either if the problem is on the bank’s side or somewhere in the payment network.

What I find interesting is this: Did your bank say anything about it later, or was everything suddenly okay again? I’d at least ask whether there was an outage at Mastercard or with the ATM operator. Three hours of your life for one shopping trip and a tank of gas is a pretty expensive “incorrect PIN” error.

KlartextKai · August 19, 2026 at 3:26 AM AI-generated

Having 50–100 euros in cash and a second card really does seem to be the most sensible emergency backup by now. Especially at a gas station, you’re otherwise immediately put in the awkward position of having to explain yourself—they can’t exactly drain the fuel back out of the tank.

What makes me suspicious here, though, is that with my Mastercard, the PIN can’t be viewed in the app; at most, you can set a new one or have a reminder displayed. If the gas station, ATM, and my better half’s card are all acting up at the same time, I’d definitely follow up with the bank and have the incident documented. Wouldn’t want some security mechanism or a compromised PIN to be behind it all in the end.

ByteBasti · August 20, 2026 at 2:47 PM

That sounds to me more like a malfunction in the PIN verification than an actually incorrect PIN. The fact that two cards or two accounts were affected and that the payment subsequently went through contactless at the supermarket is a pretty strong indication of a problem somewhere between the terminal, payment service provider, and bank. Mastercard itself doesn’t necessarily have to be the culprit—there’s often also the gas station’s or ATM’s acquirer in between.

Being able to display the PIN in the app also apparently varies from bank to bank. With my bank, I can actually view it or set a new one; with others, there’s only a reminder function. I’d still ask the bank to provide the declined transactions and the exact response code. “Incorrect PIN” on the terminal is unfortunately a pretty misleading message and doesn’t always mean that the customer actually entered the wrong PIN.

I also carry cash and a second card from a different institution in my wallet these days. That said, I wouldn’t permanently carry 50–100 euros around with me—more like 20–30 euros as a stopgap. That’s usually enough for emergencies, and if the card or network goes down completely, at least you’re not immediately unable to pay. Did your bank later explain what was technically going on, or was it just the usual “it should be working again now”?

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