Notes for people building compliance in.

• Screening the US Entity List and UK sanctions in one API callWhy UK shipping, ERP and trade software needs US export lists and UK sanctions in the same screen, what the 10 November 50% rule changes, and working code. · 12 October 2026 · 6 min
• How to verify FCA authorisation programmaticallyPractical guide to checking whether a UK firm is FCA-authorised, with working code, status semantics, and the gotchas the official docs do not mention. · 25 April 2026 · 7 min
• Perpetual KYB under MLR 2017: what your monitoring needs to doMLR 2017 requires ongoing monitoring of business relationships, not just onboarding. What that means in code, and why most fintech monitoring stops short. · 25 April 2026 · 6 min
• FCA register API rate limit explained, and what to do when you hit itThe FCA Register API caps you at 50 requests per 10 seconds with no SLA. How the limit works, what fails when you hit it, and four ways to design around it. · 25 April 2026 · 5 min

More short answers are in the knowledge base.