Audit-grade reconciliation for the ECC migration itself. Source-vs-target hash manifests, German HGB §317 / IDW PS 330 pack, BaFin defensibility memo, multi-currency multi-ledger trial balance — sealed for 10-year retention.
Reconciliation is not row-count parity. It is the formal proof that the migration preserved the accounting record to the standard a statutory auditor, regulator and tax authority will defend.
Row counts are the easy part. Sap ecc migration reconciliation is what comes after: the proof that every BKPF document is present in Fusion with the right BSEG line items at the right amounts in the right currencies on the right ledger, that every KNA1 customer has the correct open-AR position, every LFA1 vendor has the correct open-AP position, every ANLA asset has the correct NBV across every depreciation area, every MARA material has the correct on-hand value per warehouse, every Z-* dimensional field still drives the same management report it drove in ECC — and that all of this is hash-anchored so it stays provable in year 9 when an external audit firm inherits the engagement.
On consultant-led migrations, reconciliation is typically a finance-team Excel exercise that runs for the final two months of the cutover, generates a PDF, gets signed and is never opened again. That fails the test of statutory audit defensibility under HGB §317, IDW PS 330, BaFin §44 examinations, SOX walk-throughs and IRS tax-court evidence rules — all of which require reconstructable, tamper-evident, machine-verifiable evidence that survives a decade.
Sap ecc migration reconciliation on the Syntra ETL platform produces that evidence by default. Every load is hash-anchored. Every reconciliation pack is signed and timestamped. Every Z-* routing is column-coverage-verified. Every parallel-run delta is reconciled incrementally and cumulatively. The HGB pack, the BaFin pack, the SOX pack and the IRS pack are different views of the same underlying evidence — generated on demand, reproducible from the manifest, audit-defensible for the full retention window.
Each runs automatically on every load, surfaces variances row-by-row, and lands in the sealed evidence binder.
Every source partition and every target partition hashed using SHA-256 in canonical-row form, Merkle-rolled to partition hash, manifest signed. Tamper-evident for the full retention window.
Per ledger (leading 0L + IFRS + HGB + US-GAAP non-leading), per company code, per period, in local + group + hard currency. Zero-variance gate.
Wirtschaftsprüfer-acceptable evidence under IDW PS 330. Handelsbilanz vs Steuerbilanz where they diverge. 10-year HGB §257 / AO §147 retention.
MaRisk AT 7.2 IT-control attestation. Data lineage per regulated reporting line (FINREP, COREP). Parallel-run continuity statement. §44 examination-ready.
Every BSIK row matched to a Fusion AP open invoice; every BSID row matched to a Fusion AR open invoice. Aging buckets, partial-payment status, dunning level preserved.
Per asset per depreciation area: gross, accumulated, NBV. Movement reconciliation as journals. Sub-asset numbering preserved. Asset-class roll-ups match.
Every Z-* field's reconciliation status: collapsed to COA segment (TB pivot match), routed to DFF (row-level sample match), archived (manifest verified), retired (zero-coverage report).
A repeatable, audit-defensible workflow that scales from initial load through every parallel-run delta to final cutover sign-off.
First full extraction and load. All seven reconciliation pillars run. Hash manifests created. Initial variance surface area mapped — typically 50–200 systematic exceptions.
Mapping fixes, Z-* re-classifications, data-quality corrections at source. Affected partitions reloaded. Reconciliation re-runs. 90% of systematic exceptions cleared.
First parallel-run fiscal month. ECC deltas captured via SLT/CDC, replayed into Fusion. Incremental reconciliation per delta cycle. Cumulative TB and aging tested.
Second parallel-run fiscal month. Long-tail exceptions surfaced (rare doc types, period-end accruals, Z-* edge cases). Final remediation. Cumulative reconciliation closes.
All packs (hash manifest, multi-ledger TB, HGB §317, BaFin memo, open-item, FA register, Z-* scorecard) assembled. Signed by Syntra + internal audit. Reviewed by external audit. Wirtschaftsprüfer reviews under §317 HGB.
Sealed evidence binder anchored to immutable WORM object storage with retention-lock per HGB / SOX / BaFin / IRS. Cutover gate opens. ECC moves to read-only archive. Production cuts to Fusion.
The six structural properties that distinguish Syntra ETL's reconciliation from consultant-led Excel reconciliation.
SHA-256 canonical-row hashes Merkle-rolled to partition hashes, signed, anchored to WORM. Any post-hoc edit breaks the chain — visible to any verifier years later.
Reconciliation packs regenerated from the signed manifest + canonical Parquet archive at any point during the retention window. No vendor lock-in to a viewer.
German Wirtschaftsprüfer-acceptable format out of the box. Handelsbilanz vs Steuerbilanz reconciliation handled. Aufbewahrungspflicht preserved.
IT-control framework attestation built into the evidence pack. Data lineage per regulated reporting line. Examination-ready under §44 BaFin.
SOX 7-year, HGB/AO 10-year, IRS 7-year, FDA 21 CFR Part 11, French DGFiP FEC, Italian SDI archive, Brazilian SPED — all generated from the same source manifest.
Parallel-run deltas reconciled incrementally and cumulatively. Final cumulative reconciliation proves T0 + every delta = end-state Fusion — the only way a moving source migrates audit-defensibly.
Sap ecc migration reconciliation is the formal audit-grade proof process that the Oracle Fusion target reproduces the ECC source completely, accurately and defensibly — to a standard external audit, German Wirtschaftsprüfer, BaFin, IRS and tax authorities will accept under their respective frameworks (SOX §404, HGB §317, GoBD, IDW PS 330). It is not just row counts. It is hash-anchored evidence per partition, balance-sheet and P&L structural reconciliation per ledger per currency, open-item conservation per supplier and per customer per BU, asset register movement reconciliation per depreciation area, inventory value per item per warehouse, and Z-* custom-field continuity. The output is a sealed evidence binder — durable for the 10-year HGB retention window — that establishes audit defensibility for the migration itself.
Three reasons specific to SAP ECC. First, the cluster-table data model (BSEG, RFBLG, BSET) packs multiple logical rows into binary chunks on the source DB — naive extraction loses rows silently, naive reconciliation never notices. Second, ECC's parallel-currency and multi-ledger architecture multiplies every balance by up to three currencies times four ledgers — a sap ecc migration reconciliation has to prove twelve reconciliation surfaces, not one. Third, the Z-* custom estate (commonly 800–4,000 custom tables and dozens of append structures) means thousands of custom columns also need reconciliation — the migration may have routed each correctly or may have lost the field entirely, and the only way to know is platform-native column-level coverage scorecards.
German Handelsgesetzbuch (HGB) §257 plus Abgabenordnung (AO) §147 require 10-year retention of accounting records with original-document substantiation (Aufbewahrungspflicht). When a German entity migrates ECC to Fusion, the Wirtschaftsprüfer (statutory auditor) tests under IDW PS 330 that the migration preserved the accounting record completely and the substantiation chain still works post-cutover. The HGB audit pack produced by sap ecc migration reconciliation includes: side-by-side GL trial balance per HGB ledger per company code per period (handelsrechtlich), accumulated depreciation reconciliation per asset (Handelsbilanz vs Steuerbilanz where they differ), open item continuity per supplier and customer, lay-down of every original document with the link to the migrated journal line, and the hash anchoring that ties each Fusion record to its BKPF/BSEG source. The pack is signed by Syntra, internal audit and the Wirtschaftsprüfer.
Bundesanstalt für Finanzdienstaufsicht (BaFin) regulates German financial institutions and imposes additional substantiation requirements on ERP migrations involving regulated financial data — MaRisk (Mindestanforderungen an das Risikomanagement) Section AT 7.2 governs IT systems and data integrity. Sap ecc migration reconciliation produces additional BaFin-specific evidence beyond standard HGB: an IT-control framework attestation covering the ETL pipeline (segregation of duties, change control, access logging), a data lineage trace per regulated reporting line (GL accounts feeding FINREP, COREP, MaRisk-reports), a parallel-run defensibility memo demonstrating the cut-over date had no material discontinuity in supervised KPIs, and a forward-compatibility statement on the Fusion target's ability to feed the same regulatory reports. The combined pack passes BaFin §44 examination.
Each ECC source partition (typically per company code per fiscal year for BKPF/BSEG, per legal entity for KNA1/LFA1, per organisation for MARA) is hashed deterministically: every row's field values are canonical-ordered, joined with a delimiter, SHA-256-hashed at the row level, then Merkle-rolled into a partition hash. Both row and partition hashes land in a signed manifest. Post-load in Fusion, the same algorithm runs against the equivalent target records using the reverse-mapping catalogue to reconstruct the canonical source field set. Hash equality at the row level proves byte-perfect reconstruction; partition-level equality proves the row population is identical. Any hash divergence surfaces the exact rows that disagree, with the field-level differences highlighted. The hash manifest itself is signed and anchored — auditors years later verify the manifest, not just the data, to detect tampering.
After the bulk historical load, ECC continues taking live postings during the 1–2 fiscal-month parallel-run period. Sap ecc migration reconciliation tracks these deltas via SLT replication or modified-since watermarks on BKPF, MSEG, VBRP and the master-data tables, captures them, replays them into Fusion through FBDI delta loads or Fusion REST APIs, and re-runs the reconciliation pack at every delta. Each delta cycle adds incremental hash anchors and incremental TB/aging/asset reconciliation deltas. The cumulative evidence binder at end-of-parallel-run includes: the bulk reconciliation at T0, plus each delta-cycle reconciliation, plus a final cumulative reconciliation showing T0 + every delta = end-state Fusion. This is the only way a Wirtschaftsprüfer signs off on a migration where the source kept moving.
The evidence binder includes multiple formats matched to each consumer's preference. PDF (signed and timestamped) for external audit and Wirtschaftsprüfer human review. Excel with pivots for internal audit and controllership. CSV for ingestion into the auditor's own ACL/IDEA/Tableau tools. JSON-LD for machine consumption by SIEM or compliance platforms. Hash manifests in plain-text-canonical-JSON for long-term verification independent of any platform. Country-specific schemas (BaFin meldepflichtige Datenpunkte, IRS Form 8275 disclosure, French DGFiP FEC equivalent) generated on demand from the same reconciliation source. Every format is reproducible from the underlying hash manifest years later — no format lock-in to a vendor-specific viewer.
Per HGB §257 plus AO §147, 10 years from end of relevant fiscal year. Per SOX, 7 years. Per IRS, 7 years. Per BaFin, 10 years. Per FDA 21 CFR Part 11 (pharma), the longer of product lifecycle plus 2 years. Sap ecc migration reconciliation evidence is stored in immutable WORM (Write-Once-Read-Many) object storage with retention lock — Amazon S3 Object Lock, Azure Blob immutable storage, or on-prem equivalent. Hash manifests, signed PDFs, reconciliation packs and the underlying canonical-row Parquet archives all anchored under the retention policy. Multi-region replication for disaster resilience. Audit access via a read-only IdP-gated portal with full access logging. The evidence outlives the migration project, the Syntra contract, and typically the original platform team — designed to be retrievable in year 9.
30-minute discovery call. We'll scope your statutory framework (HGB, BaFin, SOX, IRS, FDA, country-specific), audit cadence and the Wirtschaftsprüfer's substantive testing approach — and walk through a sample evidence binder for your ECC tenant.