WinMentor e-Factura ANAF: How to configure automatic sending and downloading in 2026
Step-by-step guide for e-Factura in WinMentor: SPV configuration, automated sending of issued invoices, downloading received invoices, common errors, and solutions.
Ionut Mihaescu — Full Stack Developer Azuvio · 2026-05-22 · 7 min · ERP & Integrations
Why this guide now
Since 1 January 2024, e-Factura has been MANDATORY for B2B transactions in Romania. WinMentor features a native connector — but the initial setup often fails. This guide covers the exact steps that work in 2026 (following the 2025 ANAF (the Romanian tax authority) updates).
Step 1: Qualified digital certificate
You need a qualified digital certificate (CertSign, DigiSign, AlfaTrust). Cost: 30-60 EUR/year. Install it in Windows (Certificate Store → Personal) and verify it by accessing spv.anaf.ro — if you can log in with the certificate, you are ready.
Step 2: Activating the e-Factura connector in WinMentor
1. Open WinMentor → Service → Configuration → e-Factura menu
2. Check «Enable ANAF e-Factura»
3. Select the digital certificate from the detected list (it only appears if installed in Windows)
4. Set the environment: «Production» (NOT «Test» — in production it goes to the live ANAF system)
5. Set the direction: «Bi-directional» (send issued + download received)
6. Save and test using the «Verify ANAF connection» button
Step 3: Master data mapping for e-Factura
ANAF requires standardised fields. In WinMentor:
Item Master: every item must have a valid UOM code (HUR, KGM, LTR, MTR, etc., from the CIUS-RO list)
CPV Code: optional but recommended for invoices to public institutions
VAT Code: the correct rate (19%, 9%, 5%, 0% exempt, non-taxable)
Legal entity clients: CIF (VAT ID) with or without RO prefix (pay attention!), complete address including county and city
Step 4: Automatic sending of issued invoices
Configuration → Automatic Sending:
Frequency: every 15-30 minutes (NOT more often, as ANAF applies rate-limiting)
Type: «After printing» (the invoice is sent as soon as it is printed/saved as final)
Status checking: WinMentor automatically checks the status (Accepted / Rejected) every 1-2 hours
Step 5: Downloading received invoices
Configuration → Download received invoices:
Frequency: every 1-3 hours (NOT more often)
Auto-import into Purchase Journal: check only if you have a strict workflow; otherwise, manual review before import is preferred
Automatic supplier mapping: by CIF — if the supplier does not exist in WinMentor, the invoice remains in «Pending Mapping»
Common errors and how to solve them
«Error 401 Unauthorized»: digital certificate expired or not loaded correctly. Re-install the certificate in Windows.
«Error Invalid CIF»: the client has an incorrect CIF with/without the RO prefix. See «Saga invalid CIF error» — the logic is similar.
«Error Invalid UOM»: you used a custom UOM in the master data («pcs» instead of «HUR»). Use exact CIUS-RO codes.
«Invoice rejected — mandatory field missing»: download the rejected XML from the SPV, identify the field (usually: incomplete address, missing county), correct it in WinMentor, and resend.
«Delayed SPV response (>24h)»: ANAF is overloaded — wait, do not resend (risk of duplicates).
«My volume is high — WinMentor automation can't keep up»
For companies with >500 issued invoices/month or >1,000 received invoices/month:
The native WinMentor connector processes in batches, but at high volumes, retries and backlogs occur
It lacks smart validation («received invoice does not match PO») — everything hits the journal, and the accountant filters manually
Azuvio over WinMentor processes received invoices with automatic PO ↔ GRN ↔ Invoice matching and pushes only validated invoices to WinMentor, correctly allocated to cost centres
Conclusion
Setting up e-Factura in WinMentor takes 2-4 hours the first time. After that, it works stably. For high volumes, complementing it with an automation layer (Azuvio) eliminates manual accounting work for received invoices — which in distribution companies represents 30-50% of total time. See also the «ANAF 2026 Fiscal Calendar».