Do you use a cash register or a payment software for your business? Since the finance law of 2025 and its adjustments in 2026, the certification of cash register software has changed significantly. The rules have tightened, deadlines have shifted, and a second regulatory constraint has emerged at the same time: electronic invoicing. Here’s what you need to remember to remain compliant without any unpleasant surprises.
Cash Register Certification and Electronic Invoicing: Two Obligations Converging in September 2026
Most guides on cash register certification address the topic in isolation. The reality on the ground is different: starting from September 1, 2026, companies subject to VAT will face a double constraint simultaneously.
The first is the certified cash register software. Your payment system must ensure the immutability, security, retention, and archiving of payment data, in accordance with Article 286 I-3 bis of the General Tax Code.
The second is the mandatory receipt of electronic invoices via an approved platform (public platform or partner). Therefore, your software provider must cover both areas: cash register certification and e-invoicing compatibility.
Before choosing or renewing your payment solution, you can discover Caps Entreprise online to better understand the concrete implications of this compliance.
Why is this a common trap? A merchant may have perfectly certified cash register software but be unable to process electronic invoicing formats (Factur-X, UBL, CII). In that case, you will either need to change solutions or add a compatible module. It’s better to anticipate this convergence rather than manage two separate software migrations.
Publisher Certificate or NF525/LNE Certificate: What Proof of Compliance in 2026
You may have heard about the removal of the publisher certificate in February 2025, followed by its reinstatement a year later. This regulatory back-and-forth has caused confusion among many merchants and restaurateurs.
Here’s the current status as of February 21, 2026: the finance law for 2026 (law n 2026-103, Article 125) has reinstated the individual publisher certificate as a valid proof of compliance. Thus, two modes of proof coexist again.
- The certificate issued by an accredited body, after auditing the software. The two recognized certifications are NF525 (issued by InfoCert) and LNE certification (National Laboratory of Metrology and Testing).
- The individual publisher certificate, compliant with the official model BOI-LETTRE-000242 published by the tax administration. The BOFiP was updated on March 25, 2026, to incorporate this reinstatement.
- In both cases, the document must certify that the software meets the four legal conditions: immutability, security, retention, and archiving of data.
The difference between the two is significant. The NF525 or LNE certificate is based on an independent technical audit. The publisher certificate only engages the responsibility of the software provider, without external verification.
Which Choice to Prioritize
If your software already has an NF525 or LNE certificate, you have nothing to change. This certificate remains the strongest proof during a tax audit.
If your provider only offers a certificate, ensure it complies with the official model. Request it in writing and keep it with your accounting documents. In case of an audit, this is the document the administration will request first.
Tax Audit and Fine: What Happens if Your Cash Register is Non-Compliant
During an audit, the tax administration may request to see the certificate or the attestation of your cash register software. The absence of this document triggers a specific procedure.
The professional first receives a fine of 7,500 euros. They then have a period of 60 days to become compliant. If, after this period, the situation is still not regularized, a new fine of the same amount may be applied.
This mechanism is not theoretical. The fight against VAT fraud related to cash register software represents a major budgetary challenge for the State. Some non-compliant software allows for the erasure of transaction history or adjustment of stock management data, removing any trace of cash receipts in the accounting.
Who is Concerned and Who is Not
The obligation applies to all professionals subject to VAT who use software or cash register systems to record their customers’ payments. This includes merchants, restaurateurs, and service providers equipped with a point-of-sale terminal or payment software.
However, self-employed individuals and micro-enterprises not subject to VAT are not concerned by this certification obligation.
Cash Register Software Compliance Timeline: Key Dates to Remember
Successive delays have muddied the understanding of the regulatory timeline. Here are the current benchmarks, as they result from the texts in force.
- Since September 1, 2025, certification by an accredited body is officially required. However, publishers have until September 1, 2026, to finalize the certification of their software.
- Until September 1, 2026, proof of a certification process initiated with an accredited body is accepted during an audit.
- As of September 1, 2026, the certificate or compliant attestation must be available without any additional delay.
The fact that the publisher certificate was reinstated in February 2026 gives professionals whose software has not yet obtained NF525 or LNE certification some leeway. This leeway is not unlimited: the certificate must exist, comply with the official model, and be presentable immediately in case of an audit.
Check now with your provider what document they can supply. If the response is vague or delayed, it’s a signal that it’s time to compare available solutions on the market, keeping in mind the dual constraint of certified cash register and electronic invoicing that will come into effect at the same time.