Navigating the legal side of payments is a major part of preventing revenue loss. As we move through 2026, the focus has shifted toward more proactive regulation.
The transition to PSD3 and PSR
The introduction of the Third Payment Services Directive (PSD3) and the Payment Services Regulation (PSR) marks a significant shift in liability. These rules place more responsibility on payment providers to ensure that Strong Customer Authentication (SCA) happens earlier in the journey. For instance, authentication is now required when a customer first adds a card to a digital wallet, rather than only at the point of checkout.
Mastering PCI DSS 4.0.1
The era of version 3.2.1 is over. Under the mandatory PCI DSS 4.0.1 standards, businesses must provide stricter evidence of security. One of the most important updates involves client-side script monitoring. You are now required to authorise every script running on your payment pages to block skimming attacks that attempt to steal data directly from a user’s browser.
Seven ways to build a proactive security strategy
Building a secure business doesn’t mean building a fortress that no one can enter. Instead, the goal is to create a smart perimeter that recognises your legitimate customers while keeping the fraudsters outside. Here’s how we recommend you refine your approach.
Tip 1: Run a tangible risk audit
Don’t guess where your weaknesses are. Start by reviewing your current payment data, specifically your last 6 months of disputes. Sort them by product type, shipping destination, and order value to find common denominators. If orders placed between 2:00 am and 4:00 am have a higher failure rate, you’ve found a pattern you can act on.
Tip 2: Master your specific compliance needs
Compliance isn’t one-size-fits-all. Familiarise yourself with the standards that govern your specific markets, particularly PCI DSS 4.0.1. Ensure your team understands that handling cardholder data is a high-stakes responsibility, not just a technical task.
Tip 3: Build pragmatic policies
Establish clear, written procedures for how you handle sensitive data and incident responses. These shouldn’t be abstract documents that sit in a folder; they should be operational guides that align with how your team actually works on a Tuesday morning.
Tip 4: Layer your technical defences
Based on your risk audit, implement a multi-layered shield. This includes encryption, tokenisation, and strong authentication. The goal is to ensure that even if a bad actor intercepts a data packet, they find nothing but useless, scrambled code.
If you operate physical locations, this applies to your hardware as well. Regularly patch and update your POS systems and card readers to close security loopholes. And never access your payment systems on public Wi-Fi. Use secure, private networks and a VPN for any remote access to keep your connection encrypted.
Tip 5: Stress-test your own checkout
Software is never finished. Regularly monitor your systems using vulnerability scans and penetration tests. One of the best ways to find a loophole is to try to use it yourself. Spend 10 minutes trying to ‘rob’ your own store in an incognito browser to see how much friction a stranger actually encounters.
Tip 6: Adapt to the shifting landscape
Even the best security strategy has a shelf life, so you need to continuously evaluate how effective your rules are. As regulation shifts from PSD2 to PSD3, or as new AI threats emerge, you must be ready to adapt. A static strategy is a failing strategy.
Tip 7: Prepare for the when, not the if
Develop a well-defined incident-response plan. If a breach occurs, your team should not be improvising. Everyone needs to know their role, from who communicates with the bank to who notifies the customers.
Part of this is also training your team to spot the human side of fraud. Educate your staff to recognise phishing emails, fake invoices, and social engineering attacks. Use the principle of least privilege to ensure employees have access only to the specific data they need for their roles. This limits the potential damage if a single account is ever compromised.
Payment security checklist for European merchants
Use this checklist to ensure your business remains a difficult target for fraud without adding unnecessary friction to your checkout.
Audit your data: export the past 6 months of disputes to identify patterns in timing, product types, and locations.
Update your compliance: move to PCI DSS 4.0.1 and audit all client-side scripts running on your checkout to block skimming attacks.
Optimise authentication: use Dynamic 3D Secure to request exemptions for low-risk orders while keeping friction for high-risk payments.
Enable tokenisation: ensure your server never stores raw card data by replacing sensitive information with secure digital tokens.
Limit dashboard access: apply the principle of least privilege, giving staff access only to the specific data their role requires.
Secure your network: enforce VPN use for remote access and keep all POS firmware and ecommerce plugins up to date.
Formalise a response plan: define clear roles for containing a breach and communicating with banks, issuers, and customers.
