What certifications tell you about a payment processor's security

When you hand over payment information to a website or app, you are trusting that company to protect your card number, bank account, or personal details from theft. Payment security certifications are third-party verifications that a company has met specific security standards. They do not may provide nothing will ever go wrong, but they do mean an independent auditor has checked the company's systems and found them meeting a published standard.

The certifications that matter most depend on what kind of payment you are making and who is handling it. A retailer processing credit cards needs different certifications than a peer-to-peer payment app. Knowing which certifications apply to your situation helps you decide whether a payment method is worth using.

Key Takeaways

  • PCI DSS (Payment Card Industry Data Security Standard) is the most common certification for any business that accepts or stores credit card information.
  • SOC 2 Type II means an auditor has verified that a company's security controls actually work over time, not just on paper.
  • ISO 27001 covers information security broadly and is often held by larger payment processors and financial institutions.
  • A company can hold multiple certifications at once, and the presence of certifications does not mean fraud or data breaches will never happen.
  • You can usually find a company's certifications on their security or trust page, or by asking their customer support directly.

PCI DSS: the standard for credit card handling

PCI DSS (Payment Card Industry Data Security Standard) is the most widely required certification for any business that accepts, processes, or stores credit card information. It was created by the major card networks—Visa, Mastercard, American Express, Discover, and JCB—and compliance is mandatory, not optional. If a company processes credit cards and is not PCI DSS certified, it is breaking the rules set by the card networks themselves.

PCI DSS has six main requirements: install and maintain a firewall, do not use default passwords, protect stored card data, encrypt data in transit, maintain antivirus software, and restrict access to cardholder information. The standard comes in levels based on transaction volume. A small business processing fewer than 20,000 transactions per year might only need to complete a self-assessment questionnaire. A large retailer processing millions of transactions must undergo an annual audit by a may have access to security assessor.

When you see "PCI DSS compliant" on a payment processor's website, it means they have met these requirements. However, compliance is not permanent—companies must renew their certification annually and maintain the standards year-round. A company that was compliant last year might not be compliant today if they have not kept up with updates.

SOC 2 Type II: proof that security controls actually work

SOC 2 Type II is an audit that goes beyond a checklist. SOC 2 stands for Service Organization Control, and Type II means an auditor has monitored a company's security controls over a period of time—usually six months to a year—to verify they actually work in practice, not just in theory. This is different from PCI DSS, which is more of a compliance checklist.

SOC 2 Type II audits cover five areas: security, availability, processing integrity, confidentiality, and privacy. For payment processors, the security and confidentiality sections matter most. An auditor will examine whether the company's access controls prevent unauthorized people from viewing customer data, whether encryption is actually in place and working, and whether the company detects and responds to security incidents.

SOC 2 Type II is voluntary, not mandatory like PCI DSS. Larger payment processors and fintech companies often pursue it because it signals to customers and business partners that their security has been independently verified over time. If a payment processor holds SOC 2 Type II, you can usually request to see a summary of the audit results—called a SOC 2 report—though companies often keep the full report confidential.

ISO 27001: information security management across the business

ISO 27001 is an international standard for information security management. Unlike PCI DSS, which focuses specifically on credit card data, ISO 27001 covers how a company protects all sensitive information—customer data, employee records, trade secrets, and payment information. It is common among large financial institutions, payment processors, and companies that handle data for multiple industries.

ISO 27001 certification requires a company to document its security policies, train employees, manage access to systems, and regularly test its defenses. An external auditor verifies that these controls are in place and working. The standard is updated periodically, and companies must renew their certification every three years.

For a payment processor, ISO 27001 is often held alongside PCI DSS and SOC 2 Type II. It does not replace those certifications but adds another layer of verification that the company takes information security seriously across its entire operation.

Other certifications you may encounter

GDPR compliance is not a certification in the traditional sense, but it is a legal requirement for any company handling payment information from European customers. GDPR (General Data Protection Regulation) sets rules for how personal data must be collected, stored, and deleted. A payment processor serving European customers should be able to tell you how they comply with GDPR. Some companies publish a GDPR compliance statement on their website.

3D Secure certification applies to credit card processors and means the company supports an extra layer of authentication when you make an online purchase. When a retailer asks you to enter a code sent to your phone or to verify your identity through your bank's app, that is 3D Secure at work. The certification verifies that the processor has implemented this standard correctly.

PCI PIN Transaction Security (PTS) applies to companies that handle PIN-based transactions, such as ATM operators or debit card processors. It is less common for consumer-facing payment apps but relevant if you are using a service that processes PIN-protected transactions.

How to find and verify a company's certifications

Most payment processors and fintech companies list their certifications on a dedicated security or trust page. Look for a section labeled "Security," "Compliance," "Trust," or "Certifications." The page should name the specific certifications held and often include the date of the most recent audit or renewal.

If you do not see certifications listed, you can contact the company's customer support or security team directly and ask. A legitimate payment processor should be able to tell you which certifications they hold and provide documentation. Be wary of vague language like "we take security seriously" without naming specific certifications—that is not the same as holding an actual certification.

You can also verify a company's PCI DSS compliance through the PCI Security Standards Council website, which maintains a list of certified service providers. For SOC 2 and ISO 27001, the company should be able to provide proof, though they may not share the full audit report publicly.

What certifications do not may provide

Holding certifications means a company has met a security standard at a point in time, but it does not mean data breaches will never happen. Certifications verify that a company has certain controls in place—firewalls, encryption, access restrictions—but they do not prevent all types of fraud or theft. A certified company can still be hacked if an attacker finds a vulnerability the auditor missed, or if an employee mishandles data.

Certifications also do not cover fraud that happens outside the payment processor's systems. If you give your card number to a scammer posing as a retailer, or if you fall for a phishing email, the payment processor's certifications will not protect you. Those are problems with how you use the payment method, not with the processor's security.

Additionally, certifications expire and require renewal. A company that was certified two years ago may no longer be certified if they have not maintained their standards or passed a new audit. Always check the date of the certification, not just whether the company claims to hold it.

Frequently Asked Questions

Do I need to check certifications before using a payment app?

For major payment apps and processors—PayPal, Square, Stripe, your bank's app—certifications are standard and you can assume they hold them. For smaller or newer services, checking their security page is worth a few minutes. If a company cannot tell you what certifications they hold, that is a red flag.

Is PCI DSS the only certification that matters?

PCI DSS is mandatory for credit card processing, so it is the baseline. SOC 2 Type II and ISO 27001 add extra verification that security controls actually work over time. A company holding all three is generally more trustworthy than one holding only PCI DSS, but PCI DSS alone is sufficient for basic compliance.

What if a payment processor says they are certified but I cannot find proof?

Ask them directly for documentation or a link to their certification. Legitimate companies can provide this. If they refuse or give vague answers, consider using a different processor. Certifications are public information that companies are proud to share.

Can a certified company still lose my payment information?

Certifications reduce the risk but do not eliminate it. A certified company has security controls in place, but no system is 100 percent secure. If a data breach does happen, your credit card issuer or bank typically covers fraudulent charges, so your financial liability is limited.

How often do certifications need to be renewed?

PCI DSS requires annual renewal. SOC 2 Type II audits typically cover a six-month to one-year period and are renewed annually or every two years. ISO 27001 requires renewal every three years. Check the date on a company's certification to see how current it is.