Payment Services Directive (PSD2): Open Banking Compliance and Implementation

Overview

PSD2 technical guide: Strong Customer Authentication (SCA), open banking APIs, PISP and AISP licensing, screen scraping prohibition, and PSD3 transition planning.

Quick Answer: PSD2 (Payment Services Directive 2) is an EU directive that requires banks to open account information (AISP) and payment initiation (PISP) APIs to authorized third parties with customer consent. This regulation forms the foundation of the open banking ecosystem.

Why This Matters

Understanding this topic is essential for businesses and professionals in the fintech and blockchain industry. The regulatory landscape, technical requirements and market dynamics continue to evolve rapidly.

Key Principles

Regulatory Framework

Different jurisdictions apply varying regulatory standards. In Turkey, the Capital Markets Board (SPK) and Banking Regulation and Supervision Agency (BDDK) oversee fintech activities. The EU’s MiCA regulation provides comprehensive rules for crypto assets, while FATF recommendations set global AML/CFT standards.

Authoritative Sources:

• EBA – PSD2 Technical Standards
• European Commission – PSD3 Proposal

Technical Considerations

Modern fintech and blockchain implementations require robust technical architecture:

• Security: End-to-end encryption, access controls, penetration testing
• Scalability: Handling growth in users and transaction volumes
• Compliance: KYC/AML automation, audit trails, reporting capabilities
• Integration: REST APIs, WebSocket connections, standard protocols

Best Practices

1. Start with requirements analysis – Clearly define business objectives before selecting technology
2. Engage regulators early – Build relationships with supervisory authorities during development
3. Security by design – Integrate security controls from the ground up, not as an afterthought
4. Maintain comprehensive audit trails – All transactions and decisions must be logged
5. Stay current with regulations – Subscribe to regulatory updates from relevant authorities

Related Articles

• Open Finance and API Banking: Beyond Open Banking to Full Financial Data Sharing
• E-Money Institution License: Application Process and Requirements
• ISO 20022: The New Standard for Financial Messaging and Payments
• Payment Systems Modernization: Real-Time Payments, ISO 20022, and Instant Settlement

io40’s Expertise

io40 provides end-to-end technical solutions for fintech and blockchain projects. Our team combines deep technical expertise in blockchain development, payment systems and regulatory compliance consulting.

Our core capabilities:

• Blockchain infrastructure development
• KYC/AML system integration
• Payment gateway and API development
• Regulatory compliance consulting
• Smart contract development and auditing

Contact us to discuss your project requirements, or explore our services.

Disclaimer: This content is for informational purposes only and does not constitute legal or financial advice. Consult qualified licensed professionals for specific guidance.