POS software: NF525 cash register
for repair shops
A cash register designed for smartphone repairers: tamper-proof fiscal journal, SHA-256 chaining, automatic Z-reports, multi-rate VAT. Ready for a tax audit from day one.
The real NF525 stakes for a repair shop
Since 1 January 2018, any VAT-registered business using POS software must be able to prove the immutability of its records. For a smartphone repair shop, this means every spare-part sale, every job invoice, every counter payment must be written into a tamper-proof fiscal journal.
Many repairers still use spreadsheets, paper notebooks, or generic software that fails the four NF525 criteria: immutability, security, retention and archiving. In an audit, the fine can reach €7,500 per non-compliant piece of software, plus a challenge to the declared revenue.
FixVault was architected from day one around NF525 compliance, not as an “option to enable”. Each fiscal entry is cryptographically chained to the previous one; any attempt to alter it breaks the chain and becomes immediately detectable.
A complete NF525 cash register
Append-only fiscal journal
Tamper-proof FiscalEntry model with sequential numbering and timestamping. No entry can be deleted or modified.
SHA-256 chaining
Each entry contains the hash of the previous one (sequenceNum | entryType | amount | date | previousHash). The chain is verifiable in one click.
Automatic Z-reports
Daily closing numbered Z-####, with VAT breakdown by rate, detail by payment method, and an archived PDF.
Multi-register & sessions
Management of several cash registers per shop, open/close sessions per operator (CS-####), and cash-drawer reconciliation.
9 payment methods
Cash, card, Stripe, PayPal, Klarna, transfer, cheque, gift card, loyalty points. Automatic breakdown in the Z-report.
Tamper-proof PDF archiving
Signed PDF export of every Z-report and of the full fiscal journal for legal archiving (10 years).
FixVault vs generic cash registers
| NF525 requirement | FixVault | Generic register |
|---|---|---|
| Immutability | Append-only + SHA-256 | Often missing |
| Sequential numbering | Atomic (Counter) | Reset possible |
| Daily Z-report | Automated + PDF | Manual |
| Cryptographic chaining | Verifiable SHA-256 | No |
| Multi-VAT 20/10/5.5/0 | Yes | Partial |
| Repair trade | Native (tickets, warranty) | No |
| Price | From €49/month all-inclusive | Variable |
E.repare - Gujan-Mestras (33)
“NF525 compliance used to be our daily worry. With FixVault, every payment is written into the fiscal journal, every Z is archived automatically. In an audit, we export everything in two clicks. It's simple, it's solid.”Visit erepare33.fr →
FAQ - NF525 cash register
What is the NF525 standard and who must comply with it?+
NF525 is the French standard governing POS software. Since 2018, any VAT-registered professional recording payments through POS software must use a compliant solution: data immutability, security, retention and archiving. Smartphone repair shops are directly concerned.
Is FixVault a certified NF525 POS software?+
FixVault implements all NF525 requirements: an append-only fiscal journal, SHA-256 chaining of every entry (sequenceNum, entryType, amount, date, previousHash), daily Z-reports, archiving, and user traceability. Everything is auditable and verifiable at any time from the interface.
How is a Z-report generated with FixVault?+
The Z-report is triggered in one click at end of day. FixVault automatically computes the VAT breakdown by rate, the detail by payment method (card, cash, transfer, Stripe, PayPal, Klarna…), the sales total and the cash-drawer total. The Z is sequentially numbered (Z-####) and archived as a tamper-proof PDF.
What happens during a tax audit?+
In a few clicks, FixVault provides all the documents required by the tax authorities: the full fiscal journal, Z-reports, cryptographic-chaining proofs, accounting export, and cash-session history. All entries are tamper-proof thanks to SHA-256 chaining.
Can several cash registers be used in the same shop?+
Yes. FixVault handles multiple registers (CashRegister) with individual cash sessions (CS-####), open/close per operator, cash-drawer reconciliation, and centralized fiscal consolidation.
Bring your register into compliance
Gratuit, sans carte bancaire : 14 jours en accès complet à toutes les fonctions, puis abonnement pour continuer, NF525 inclus. Abonnement payant en option (dès 49€/mois TTC) pour l'usage complet, sans engagement, résiliable à tout moment.