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Modulr glossary

Pay.UK

Pay.UK is a UK retail payments authority, responsible for operating and managing key UK payment systems. It’s not a payment provider or bank itself but rather a regulated central infrastructure organisation that maintains the UK's critical payment schemes. Pay.UK imposes the rules for Bacs, Faster Payments, and the Image Clearing System for cheques (with Vocalink running services). It ensures secure, efficient, and reliable payment processing across the UK economy.

Applications

E-commerce:

Reduces fraud in online card payments by verifying the cardholder's identity

Banking and fintech:

Helps issuers and payment providers comply with Strong Customer Authentication (SCA) requirements.

Advantages

  • Enhanced security: Reduces unauthorised transactions by verifying that the genuine account holder is authorising the payment
  • Fraud prevention: Helps reduce chargebacks related to fraud.

Challenges

  • User Experience: Additional authentication steps can cause friction and increase checkout abandonment
  • Implementation complexity: Requires integration with card schemes and issuer systems.

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