Digital Payments: What Happens Behind the Scenes—and What Else You Should Know

Have you ever experienced this? You're standing at a payment terminal somewhere abroad, card already in hand, when a question pops up on the screen:

"Pay in Swiss francs or local currency?"

Swiss francs sound more logical, right? At least you immediately know how much you're paying.

You tap "Swiss francs," hear the familiar beep, and the payment goes through.

Then, when you get home and check your credit card statement, you realize that one small click cost you significantly more than it should have.

We make payments every day—in supermarkets, online, at restaurants, while travelling—yet for most of us, what actually happens in the few seconds between the beep and the confirmation remains a complete mystery.

That's exactly what I discussed with Santosh Ritter, Country Manager Switzerland & Liechtenstein at Visa, in the latest episode of the Money Talks Podcast. Here are the biggest takeaways, along with the payment mistakes that can cost you the most money.

How Transactions are Processed:

What really happens in the few seconds after the beep? When you tap your card on a payment terminal, an impressive logistical process begins behind the scenes.

The terminal first verifies your card's identity and forwards the information to the merchant's payment provider. That provider then sends an authorization request through the payment network.

There, around 500 different risk indicators are checked in real time before the request reaches your bank. Your bank verifies your PIN, spending limit, and available funds before sending an approval back through the network to the terminal.

Only once that approval arrives do you hear the familiar beep.

Here's something many people don't realize:

At the moment you hear the beep, no money has actually changed hands yet.

The merchant only knows that the payment has been guaranteed.

The actual transfer of funds happens later—typically at the end of the business day—when merchants submit their daily transactions. Behind the scenes, payment obligations between approximately 14,500 connected financial institutions worldwide are reconciled (clearing) before the actual money transfers (settlement) take place.

This incredible speed is made possible by a vast global infrastructure. In Visa's case, for example, this includes its own telecommunications network spanning approximately 38 million kilometres of cable—roughly 900 times around the Earth.

Avoid This Expensive Mistake When Paying Abroad

Back to that question:

"Swiss francs or local currency?"

It may seem like a courtesy—but it's actually a well-known cost trap called Dynamic Currency Conversion (DCC).

If you choose your home currency, your bank does not perform the exchange.

Instead, the terminal or ATM operator converts the payment using an exchange rate they determine themselves—which is often significantly worse than the official market rate.

Here's what that can mean in practice:

On a purchase worth €1,000, paying in local currency with average Swiss credit cards typically costing around CHF 25–50 in conversion fees.

Choosing Swiss francs, however, can increase that cost to CHF 120–150 (Source: moneyland.ch, June 2026).

The rule is simple:

Whenever you pay abroad, always choose the local currency.

Let your own bank or card issuer handle the exchange.

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Two More Useful Travel Payment Tips

• Add your payment cards to your mobile wallet. Most people always have their phone with them—even at the beach.
• Check your bank's geographic security settings. Many banks allow you to enable or disable card usage for specific countries or regions. If your travel destination is blocked, your payment simply won't work.

Common Myths Debunked: What You Should Know

"My bank can see exactly what I buy, and the merchant receives my bank details."

False.

The merchant only receives payment authorization—not your banking information.

"Signing instead of entering a PIN is safer for consumers."

Not really.

A signature can easily be forged, while a PIN or biometric authentication provides much stronger protection.

"If someone uses my card without permission, I'm responsible for the loss."

False—at least in Switzerland.

The Zero Liability principle generally protects you against unauthorized transactions, provided you've fulfilled your own responsibilities (for example, not writing your PIN on your card).

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What If Your Phone Is Stolen?

The good news first:

Every mobile payment requires biometric authentication—typically Face ID or a fingerprint.

Without it, nobody can access your digital wallet, even if they physically have your phone.

If your phone is protected only by a simple passcode rather than biometrics, it's worth temporarily blocking your payment cards with your card issuer as a precaution.

Regardless, acting quickly is essential.

Here's what I would do immediately:

• Lock or erase your phone remotely using Find My (iPhone) or Find My Device (Android).
• Contact your bank or card issuer to block your cards—even if you're unsure whether they've been misused. Most providers offer 24/7 hotlines.
• Block your SIM card through your mobile provider to prevent criminals from intercepting SMS verification codes.
• Report the theft to the police. This is important not only for insurance purposes but also because banks may request a police report during fraud investigations.

The sooner you report the theft, the better.

The Rise of Contactless Payments

Our payment habits are changing. Like me, you may rarely carry cash anymore, opting instead for digital payment systems.

If so, you're not alone.

According to the latest Visa Payment Monitor, smartphones and mobile wallets became Switzerland's most popular digital payment methods for the first time in 2026.

• 28% prefer paying with their smartphone.
• 27% prefer debit cards.
• 25% still prefer cash.

(Source: Visa Payment Monitor, 16 February 2026.)

Security remains the most important factor when choosing a payment method.

• 63% rank security first.
• 52% prioritize speed.
• 50% value widespread acceptance.

This is also changing brick-and-mortar retail.

One in three people now actively avoid shops that accept only cash—a significantly higher proportion than in Germany (20%) or Austria (26%).

Even so, more than half of people still carry some cash as a backup in case digital payment systems aren't available.

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Watch Out for Scammers

Fraud techniques continue to evolve.

Criminals always target the weakest link.

In the past, phishing emails were often easy to spot because of poor grammar or awkward wording.

Today, artificial intelligence can generate highly convincing messages in almost any language.

Fraud is also moving beyond email, affecting sectors including finance and making fraud prevention a critical component for safeguarding these initiatives.

Scammers increasingly target people through WhatsApp and SMS.

The good news?

Fraud rates in Europe are actually declining, partly because suspicious transactions are increasingly blocked before money is transferred.

Your best protection remains:

• Check the sender's email address or phone number carefully.
• Never click links if you're unsure.
• Never enter your banking or card details through suspicious messages.
• Block and report suspicious numbers whenever possible.

The Future of Payments: AI Agents and Stablecoins

Artificial intelligence and tokenization are expected to transform payments in the coming years.

Behind the scenes, companies are already developing systems where AI agents won't just search for products—they'll complete purchases on your behalf.

According to the latest Payment Monitor, 30% of respondents expect AI to start making purchases independently in the near future.

This naturally raises an important question:

How do you know you can trust the AI agent?

Certification will play a key role.

Visa, for example, is working on systems that allow banks and merchants to verify that an AI agent is genuinely acting on your behalf.

Importantly, AI won't simply be able to spend your money freely, especially with advancements in digital payment systems.

You remain in control because final payment authorization will still require your biometric approval.

Initially, AI agents are likely to automate smaller everyday purchases—such as coffee capsules or socks.

Larger purchases like flights or hotels will probably only become common once people have developed greater trust in their digital assistants.

Another important development is stablecoins—cryptocurrencies whose value is linked to stable assets such as the US dollar or gold.

Beyond making payments more efficient, stablecoins could significantly improve cross-border transactions, whether you're sending money to family abroad or a business is paying international suppliers around the clock without relying on banking hours.

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I've made it a habit to consciously choose "local currency" every time I pay abroad—and these days I pay almost exclusively with my phone.

How do you prefer to pay, and would you trust an AI agent to make payments on your behalf? 💳