Most Reconciliation Problems Are Data Problems in Disguise
- Iain Colquhoun

- Mar 10
- 2 min read
Updated: Apr 20

We recently completed a major Nostro reconciliation transformation for a global financial institution. This project involved a complete rebuild of the data architecture across an international branch network. Here’s what we discovered when we examined the system closely.
Understanding the Data Challenges
The source system had a global data layer that was similar but not identical across regions. Each data feed contained dozens of distinct data source types, each with its own structure. All of this data was pushed through a single flat mapping into generic reference fields. Unfortunately, there was no consistency across regions or data sources.
A critical identifier could be buried inside a longer text field or fragmented across two or three separate reference fields. As a result, the reconciliation engine lacked reliable data to match against.
The Impact of Unmatched Items
Unmatched items were not routing to the appropriate business areas. Instead, they fell into a global exception bucket. This situation required manual re-allocation before anyone could begin investigating the breaks.
Operations teams found themselves overwhelmed with work that wasn't productive. Eventually, this inefficiency caught the attention of regulators.
The Path to a Solution
The fix required us to go all the way back to the data. We needed to understand the underlying issues before implementing any changes.
Identifying the Root Causes
To address the data inconsistencies, we first conducted a thorough analysis of the existing data architecture. This involved:
Mapping out the data flows across all regions.
Identifying discrepancies in data formats and structures.
Engaging with stakeholders to understand their specific needs.
By doing this, we were able to pinpoint the root causes of the reconciliation problems.
Designing a New Data Architecture
Once we understood the issues, we set out to design a new data architecture. This architecture needed to be robust and flexible enough to accommodate the diverse data sources. Key steps included:
Creating standardized data formats for all regions.
Implementing a centralised data repository to ensure consistency.
Developing a more sophisticated reconciliation engine capable of handling complex data structures.
Implementing the Solution
With the new architecture in place, we began the implementation phase. This involved:
Migrating existing data to the new system.
Testing the reconciliation engine to ensure it could accurately match data.
Training staff on the new processes and tools.
The transition was not without its challenges, but we remained focused on our goal.
Measuring Success
After the implementation, we closely monitored the system's performance. We measured success through:
A significant reduction in unmatched items.
Improved efficiency in operations teams.
Positive feedback from regulators.
These metrics demonstrated that we had successfully addressed the reconciliation challenges.
Conclusion
In conclusion, our experience with the Nostro reconciliation transformation highlighted that most reconciliation problems are, in fact, data problems in disguise. By focusing on the data architecture and implementing a strategic solution, we were able to achieve confidence, efficiency, and measurable returns on investment for our client.
Part 2 coming next week — how we rebuilt it.



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