generated: '2026-07-24'
method: searched
source: https://www.wearepay.uk/what-we-do/standards-authority/iso-20022/
note: >-
  Pay.UK is the UK scheme standards authority. Conformance here reflects the
  messaging and payment standards Pay.UK itself defines and operates against,
  established from its public standards documentation. There is no public
  OpenAPI, so REST/HTTP cross-cutting standards (RFC 9457, JSON:API, pagination,
  idempotency) cannot be asserted from a spec and are recorded as unknown rather
  than claimed.
standards:
- id: iso20022
  conforms: true
  evidence: >-
    Pay.UK is the UK scheme standards authority for ISO 20022. The Faster
    Payment System is migrating to ISO 20022 and Pay.UK publishes an FPS ISO
    20022 Standards Library plus ISO 8583-to-ISO 20022 mapping guidance; ISO
    20022 also underpins the New Payments Architecture, and the Confirmation of
    Payee and Request to Pay overlay services are defined on ISO 20022 messaging.
  docs: https://www.wearepay.uk/what-we-do/standards-authority/iso-20022/
- id: iso8583
  conforms: true
  evidence: >-
    Legacy Faster Payment System messaging standard, being migrated away from to
    ISO 20022. Documented in the FPS ISO 20022 Standards Library mapping guidance.
  docs: https://www.wearepay.uk/what-we-do/payment-systems/faster-payment-system/faster-payment-system-iso20022-standards-library/
- id: confirmation-of-payee
  conforms: true
  evidence: >-
    Pay.UK owns and operates the UK Confirmation of Payee scheme — an
    industry-wide, API-based peer-to-peer account name-checking standard that
    participants and approved vendors implement against Pay.UK's technical
    standard (distributed via the gated Standards Source portal).
  docs: https://www.wearepay.uk/what-we-do/overlay-services/confirmation-of-payee/
- id: rfc9457-problem-details
  conforms: unknown
  evidence: No public OpenAPI or error reference published to verify.
- id: oauth2
  conforms: unknown
  evidence: >-
    No public self-serve API; access is via scheme participation and gated
    portal registration, not a documented OAuth flow.