All the answers about the e-invoicing reform and about Diamontis FX, organized by profile.
Any company subject to VAT and established in France is affected. This includes micro-businesses, SMEs, mid-sized companies (ETI) and large enterprises, regardless of their activity or size, as soon as they issue or receive invoices between French businesses (domestic B2B).
Sole traders and micro-businesses not subject to VAT are not required to issue e-invoices, but they must be able to receive electronic invoices from their suppliers.
1 September 2026: receiving obligation for all VAT-registered businesses. You must have designated a Registered Platform (PA) and be able to receive an electronic invoice.
1 September 2026: issuing obligation for large enterprises and mid-sized companies (ETI) only.
1 September 2027: issuing obligation extended to SMEs, micro-businesses and sole traders.
The most urgent point for everyone: receiving. You have little time left to choose your solution.
You will be in breach of the legal obligation. The penalties provided for are:
Beyond the penalties, your suppliers and customers who already issue electronic invoices could have difficulty invoicing you, which would disrupt your business relationships.
No, not for B2B invoices between French VAT-registered businesses. A simple PDF attached to an email no longer satisfies the legal obligation.
The invoice must go through a Registered Platform (PA), in a recognized structured format: Factur-X (hybrid readable PDF with embedded XML data), UBL or CII.
Diamontis FX lets you upload your existing PDF invoices: the system automatically extracts the information, pre-fills the form, and sends your invoice in the regulatory format via the Registered Platform SuperPDP.
A Registered Platform (PA) is a private operator registered with the DGFiP, the only type of entity authorized to transmit invoices and e-reporting data to the tax authorities. It is the new name for what used to be called a partner dematerialisation platform (PDP): both terms mean exactly the same thing, and the latter is still the one most commonly used.
Diamontis FX is not a Registered Platform. It is a compatible solution (SC) that relies on the registered PA SuperPDP to ensure regulatory compliance. Diamontis FX adds the business layer: intuitive interface, product catalog, lifecycle tracking, archiving, FEC export, multi-company management, and security.
This architecture is transparent: when you sign up, you sign a timestamped designation mandate that explicitly designates SuperPDP as your Registered Platform.
E-reporting is the obligation to transmit data on your B2C sales (to consumers), your international transactions and your payment collections to the tax authorities. It complements e-invoicing (B2B invoices).
E-reporting follows the same timetable as issuing: large enterprises and mid-sized companies (ETI) from 1 September 2026, SMEs and micro-businesses from 1 September 2027.
Diamontis FX automatically handles these transmissions via the PA SuperPDP, without any action required on your part.
Diamontis FX offers three plans:
If your main obligation by 01/09/2026 is to be able to receive invoices (all businesses), the Receiving plan is enough, and it is completely free, with no commitment.
Sign-up is done in 4 quick steps guided by an assistant:
The connection is then finalized automatically. You are up and running within minutes.
On a monthly plan, yes: there is no minimum commitment. You can cancel your Pro or Business subscription at any time from your account, effective at the end of the current monthly period. On a yearly plan, the subscription is committed for twelve months (with two months free); cancellation takes effect at the end of that period.
If you cancel, your archived invoices remain accessible for consultation for the legal retention period (10 years), and you can export your data before leaving (guaranteed reversibility).
The designation mandate is the legal document by which your company designates a Registered Platform as its e-invoicing operator. Without this mandate, the PA cannot register your SIREN in the central directory managed by the DGFiP.
At Diamontis FX, this mandate is timestamped and archived with evidential value. You sign it electronically at the end of the sign-up wizard. It explicitly names SuperPDP as the designated PA, in accordance with regulatory requirements.
Reversibility is guaranteed. You can export all your data (invoices in their original format, FEC file, history) from your account at any time.
To switch Registered Platforms, you will need to sign a new designation mandate with the new solution. Diamontis FX supports you through this process and provides all the necessary documents.
The Business plan includes multi-company management and accounting firm access. From a single account, you can navigate between your clients' files, view their invoices, track statuses and export FEC files for each of them.
Each client company keeps its own tax configuration, product catalog and independent history. Isolation between files is complete.
Yes. Diamontis FX offers an invitation system: you create the space for a client company, then send an invitation for them to complete their sign-up (SIREN, designation mandate, plan choice). You keep firm access with read or manage rights depending on the permissions granted.
From your dashboard, in the Export section, you select the desired period and download the FEC file (Fichier des Écritures Comptables) in the format specified by article A.47 A-1 of the Livre des procédures fiscales (LPF).
This file can be used directly by an accountant in their software or submitted to the tax authorities in the event of a tax audit.
No. Diamontis FX is an e-invoicing solution compliant with the 2026 reform, not general accounting software. It fits into your existing workflow: invoices received and issued are available for import into your accounting tool via the FEC export or a future API.
The designation mandate must be signed by a legal representative of the company or an authorized person (proxy holder). As part of an extended accounting assistance mandate, an accountant may be authorized to sign this type of document. However, we recommend having the company's director or manager sign directly, to avoid any dispute over the validity of consent.
Yes. All Diamontis FX data - invoices, company data, personal information - is hosted on servers located in France, in compliance with the GDPR and data localization rules.
Evidential archiving guarantees the integrity, authenticity and readability of your invoices throughout the legal retention period, i.e. 10 years (accounting obligation under art. L123-22 of the Code de commerce).
Each invoice is kept in its original form (structured file as received or issued), with a timestamp and an immutable audit trail. This meets the DGFiP's requirements for tax audits and the obligations of art. L102B of the Livre des procédures fiscales.
Yes. Diamontis FX includes multi-factor authentication via a TOTP app (Google Authenticator, Authy, etc.). MFA activation is available in your account's security settings. We strongly recommend enabling it, especially for firm accounts that access several client files.
Each invoice goes through statuses defined by the AFNOR XP Z12-012 standard:
Statuses are updated in real time via the PA SuperPDP and are visible in your dashboard.
Diamontis FX supports the three formats recognized by the DGFiP:
For UBL and CII invoices without an attached PDF, Diamontis FX automatically generates a readable rendering.
Diamontis FX continuously monitors the availability of the PA SuperPDP and would alert you in the event of an incident. Diamontis FX's architecture is designed to be compatible with several Registered Platforms (PA-agnostic abstraction layer), which allows a switchover to an alternative PA in the event of a prolonged SuperPDP outage.
Your archived data and invoices remain accessible for consultation even if the issuing/receiving service is interrupted.
Our team is available to answer all your questions about the reform and about Diamontis FX.