To support France's Continuous Transaction Control (CTC) e-invoicing mandate coming into force on 1 September 2026, Castorama has added three new read-only custom fields to its Mirakl marketplace platform. These fields enable the automatic transmission of seller identification data at the order level.
No action is required in your Mirakl back office. Castorama populates these custom fields automatically upon order creation, and account settings do not need to be updated manually.
Field Mapping Breakdown
The three additional read-only fields are exposed through Mirakl order payloads ("OR11 order_additional_fields") and mapped within Lengow as follows:
| Code | Label | Description | Lengow Mapping |
|---|---|---|---|
| "siret-number" | SIRET Number | SIRET number required for e-invoicing | "order_meta" (generic) |
| "siren-number" | SIREN Number | SIREN number required for e-invoicing | "order_meta" (generic) |
| "vat-registration-number" | VAT Registration Number | VAT registration number required for e-invoicing | "billing.vat_number" |
Impact for Sellers and Integrators
- Automatic Data Retrieval: Information is automatically provided by Castorama during order placement and requires no manual setup or maintenance from sellers.
- Data Access via API:
- The SIRET and SIREN numbers are available under the "order_meta" object in the Lengow Orders API.
- The VAT registration number is directly accessible in the standard "billing.vat_number" field (following the same technical pattern as Leroy Merlin).
- Sales Continuity: No sales-disabling deadlines or shop blocking conditions apply to this addition.
Developer Note
These fields are supported natively through standard order synchronisation. If you use a custom ERP connector, ensure your system is configured to read "order_meta" and "billing.vat_number" from order payloads to retrieve full identification details for your administrative and invoicing workflows.
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