⚠️ On 20 September 2026, three important updates become effective: 🔹 Verification of Payee Scheme Rulebook v1.1 🔹 VoP API Specifications v1.1.1 🔹 API Security Framework v2.1 Although described as clarifications and urgent changes, they include practical implementation requirements that PSPs and their VoP providers need to address. The updated API specifications cover: Empty API fields, which are no longer permitted Character-set handling Timestamp requirements HTTP headers