The FintechAssuranceLabs engineering blog publishes in five categories: regulation clauses with primary sources, public incident timelines with the test that would have caught each failure, tooling configuration with versions, copyable practice checklists, and dated industry data with its testing implication. Every post names its author, with pen names disclosed on author pages, and lists dated sources.
Incidents
Synapse Financial Technologies filed for Chapter 11 bankruptcy on 22 April 2024, and its partner banks held $60 million to $90 million less for consumers than Synapse's records showed, according to the Consumer Financial Protection Bureau (CFPB). The failure class is for-benefit-of (FBO) ledger reconciliation across banks; a daily per-bank match exposes it.
Adrian Voss
Regulation
The European Accessibility Act, Directive (EU) 2019/882, has applied to consumer banking and e-commerce services since 28 June 2025. EN 301 549 V4.1.1, published 2 September 2026, moves web and app tests from Web Content Accessibility Guidelines (WCAG) 2.1 AA to WCAG 2.2 AA. V4.1.1 was not cited in the Official Journal on 22 September 2026.
Lena Marquet
Industry
US stablecoin payments come under the GENIUS Act on 18 January 2027, since no final implementing rule appeared by 22 September 2026; the EU Markets in Crypto-Assets Regulation (MiCA) already applies. Test scope covers redemption at par and its timing, reserve reconciliation, travel rule data, on-chain sanctions blocking, and foreign exchange (FX) settlement at on- and off-ramps.
Mira Kowal
Practice
Our UAT (user acceptance testing) sign off checklist for fintech releases records six decisions before go-live: business owners accepted each money flow on real-like synthetic data, UAT runs reconciled with no unexplained difference, customer notices were verified, open defects carry financial impact, rollback was rehearsed, and named signers approved with evidence retained.
Adrian Voss
Regulation
After the Payment Systems Regulator (PSR) 1 July 2026 evaluation, UK authorised push payment (APP) fraud rules require sending payment service providers (PSPs) to reimburse in-scope claims up to £85,000, minus an optional £100 excess, within five business days unless the clock stops, except first-party fraud or gross negligence. After reimbursing, they can require up to 50% from receiving PSPs.
Lena Marquet
Practice
A regression test plan for a payments release selects tests by the money flows a change touches, runs them in risk tiers, and ends with a ledger reconciliation of the test run. Our template records scope, suites per tier, entry and exit criteria, environment, synthetic data, the reconciliation check, and the named roles who sign the release.
Adrian Voss
Practice
Our risk based testing approach for fintech scores each test item by impact per failure (money moved, regulatory exposure, customer harm) and by likelihood (change frequency, integration count), and multiplies the two scores into a risk level that sets test depth. In our practice, a top-level money or regulatory item never drops below the second of four depth tiers.
Mira Kowal
Tooling
This WireMock tutorial stubs a payment processor with WireMock 3.13.2 JSON (JavaScript Object Notation) mappings: an approval, a soft decline, a timeout after approval using fixedDelayMilliseconds, an authorise-then-capture state machine built from scenarios, and a capture webhook. Every mapping was re-run against WireMock 3.13.2 on 22 September 2026 with synthetic tokens.
Tomas Reyes
Regulation
The Nacha 2026 rule changes require risk-based fraud monitoring from originating banks (ODFIs), non-consumer Originators, Third-Party Senders, Third-Party Service Providers, and receiving banks (RDFIs), with Phase 1 from 20 March 2026 and Phase 2 from 22 June 2026. ACH test scope now covers fraud alert rules, R17 return handling, and PAYROLL and PURCHASE descriptors.
Lena Marquet
Incidents
The CrowdStrike outage started on 19 July 2024 at 04:09 UTC (Coordinated Universal Time), when a Falcon sensor content update crashed online Windows hosts until its revert at 05:27, including hosts at financial firms. The failure class is a vendor update sent to every host without staged rollout. Fintech teams should test vendor update canaries, offline payments, and recovery time.
Adrian Voss
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