Case Study: top-tier Nordic banks achieve trusted customer data and PSD2 alignment with 20 Thousand Leagues

Top-tier Nordic Banks unblocks regulatory reporting with 20 Thousand Leagues

20 Thousand Leagues was engaged by a top-tier Nordic bank facing a critical data trust issue. The bank's four key departments—legal, compliance, internal audit, and technology—each used a different definition of a 'customer,' leading to irreconcilable regulatory reporting and unreliable analytics. In a separate engagement for another Northern European bank, the challenge was aligning a complex legacy payments estate with PSD2 and PCI-DSS regulations without creating contradictory, parallel workstreams.

For the first client, 20 Thousand Leagues used BPMN process mapping and a three-level enterprise architecture lens to reconcile data entities across systems, resulting in a single, signed-off customer definition agreed upon by all departments. For the second, they conducted a top-to-bottom architectural review and created a prioritized remediation roadmap governed by PRINCE2. The outcomes included unblocked regulatory reporting, trustworthy customer-level economics, and a single, actionable executive plan, consolidating fragmented expert opinions into a defendable trajectory.