Real-Time Open Banking Feed & Deterministic 3-Way Matcher
Bank rec as CSV plus ticks
“Staff accountant spends 4 hours daily ticking off cleared wires against GL line items”
Manifests in Operating cash clearing reconciliations & daily treasury positioning sheet. 1 spreadsheet hazard consolidates into 6 software modules, 2 source integrations, and 2 deterministic controls.
What the selected hazards have in common
Every component below traces to at least one selected hazard. No timelines or savings figures are estimated; measurable outcomes require your baseline data.
Records from two or more systems are compared by eye instead of matched by rule.
Reconciliation & Matching Engine resolves 1 of 1 selected hazards and should be built first after source systems are connected.
One spreadsheet pipeline, several failure points
The selected hazards are placed on the stage of the manual workflow where they do their damage. Sources on the left arrive as exports today.
- ERP / General LedgerTrial balance and subledger CSV exports
- Bank AccountsStatement downloads from bank portals
Real-Time Open Banking Feed & Deterministic 3-Way Matcher
A single system replaces the workbook. Shared modules are deduplicated across hazards; each card shows how many of the selected hazards it resolves.
What each component does, and what it needs
Modules are reusable across hazards. Inputs, outputs, enforced controls, and the point where a person still decides are listed for each.
Pulls transactions, balances, and master records directly from source-system APIs and file feeds, replacing every manual export.
- Scheduled and webhook-driven API pulls
- Idempotent loads keyed on source record IDs
- Schema validation on every payload
- Read credentials for each source system
- Field mapping per source
- Normalized transaction and master-data tables with source lineage
Matches records across two or more systems on amount, date window, and reference and isolates everything that does not match.
- Two-, three-, and multi-way matching
- Configurable tolerance and date windows
- Partial and many-to-one match handling
- Normalized transactions from each side of the match
- Canonical entity IDs
- Matched sets, unmatched items, and variance explanations
- Deterministic matching rule: auto-reconciles on exact transaction amount, date window (+/- 2 days), and wire trace ID.
- Daily cash tie-out: bank balance minus unmatched items must equal the GL cash balance every day.
Evaluates deterministic control rules on every record before it can proceed, so a failed assertion blocks the transaction instead of a person catching it later.
- Versioned rule definitions with effective dates
- Balance, threshold, and completeness assertions
- Pass/fail evidence stored per record
- Normalized records
- Policy thresholds and limits
- Assertion results attached to each record
Routes every failed assertion or unmatched item to an owner with the evidence attached, and tracks it to resolution.
- Owner assignment by rule and department
- Aging and escalation timers
- Resolution codes with required evidence
- Assertion failures and unmatched items
- Resolved exceptions with disposition and approver
Posts balanced, validated entries to the ERP through its API so nothing is retyped and every entry carries its source lineage.
- Balanced double-entry generation
- Idempotent posting with duplicate suppression
- Subledger-to-GL tie-out on every batch
- Assertion-passed records
- Chart of accounts and mapping rules
- ERP journal entries with source references
Records every load, rule evaluation, approval, and posting in an append-only log so auditors can trace any figure to who did what and when.
- Append-only event history
- Hash-chained records
- Evidence export for external audit
- Events from every other module
- Audit-ready evidence trail
Traceability from hazard to automated control
Each selected hazard maps to the module that resolves it, the deterministic rule that replaces the manual check, and the result once the rule is enforced.
| Hazard | Software module | Automated control | Result |
|---|---|---|---|
#05Bank rec as CSV plus ticks | Reconciliation & Matching Engine | Deterministic matching rule: auto-reconciles on exact transaction amount, date window (+/- 2 days), and wire trace ID. Daily cash tie-out: bank balance minus unmatched items must equal the GL cash balance every day. | Cleared items match without a person ticking them; only genuine breaks reach the queue. |
Dependency order, not a calendar
Phases follow module dependencies: nothing downstream is built before the data it needs is flowing. Durations depend on your systems and are scoped in the diagnostic.
- 1Connect source systems1 of 1 hazards touched
Replace every manual export with an authenticated API or file feed and load it idempotently.
Integration & Ingestion Layer - 2Normalize and validate records1 of 1 hazards touched
Establish canonical entities and encode the control rules the workbook was enforcing by hand.
Rules & Assertion Engine - 3Reconcile and schedule1 of 1 hazards touched
Run matching and period schedules from source data so variances surface as exceptions, not surprises.
Reconciliation & Matching Engine - 4Route exceptions and approvals1 of 1 hazards touched
Move every review and sign-off out of email and chat into owned queues with recorded decisions.
Exception Management Queue - 5Automate posting1 of 1 hazards touched
Post balanced, validated entries to the ERP through its API with source lineage on every line.
Automated Ledger Posting - 6Publish governed reporting and the audit trail1 of 1 hazards touched
Release reports only from reconciled snapshots and hand auditors an append-only evidence log.
Immutable Audit Log
Human approval points the system preserves
Deterministic software removes re-keying and eyeballing. It does not remove judgment; these are the decisions that stay with your team.
- Integration & Ingestion Layer: Approving new source connections and field mappings.
- Reconciliation & Matching Engine: Clearing unmatched items that fall outside tolerance.
- Rules & Assertion Engine: Changing a rule or threshold requires a documented approval.
- Exception Management Queue: Every exception is dispositioned by a named owner; the system never auto-clears one.
- Automated Ledger Posting: Period lock and close sign-off remain manual approvals.
- Immutable Audit Log: Auditors and controllers read the log; no one edits it.
Scope this blueprint
Leave a work email and we send you this exact blueprint (1 hazard, 6 modules) as a link you can reopen and print. The same link reaches our team, who reply with the two or three questions that turn Real-Time Open Banking Feed & Deterministic 3-Way Matcher into a scope for your books.
- No estimate is invented. Effort and payback come after we see your volumes and source systems.
- One email, then a person. No drip sequence.
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