How does e-Invoice work in WinMENTOR?

WinMENTOR generates the XML per the ANAF UBL 2.1 standard, validates it locally, and automatically transmits it to SPV (Private Virtual Space) at the time of invoice issuance. You receive a confirmation with the ANAF registration number directly in the WinMENTOR interface. Validation errors are clearly displayed and can be corrected before resubmission.

What does error code RO_EF-400 mean in e-Invoice?

Error RO_EF-400 indicates an XML validation issue — usually a missing required field or incorrect format. Check: beneficiary TIN, complete address with postal code, unit of measure per ANAF list, and that VAT amount matches the taxable base. Contact us for quick diagnosis.

Do invoices issued before implementation need to be re-transmitted to e-Invoice?

No. The e-Invoice obligation applies to invoices issued after your obligation date (January 1, 2024 for B2B). Prior invoices are not retransmitted. Important: invoices issued after this date that were not transmitted on time can generate fines — discuss with us for regularization.

ANAF COMPLIANCE

e-Invoice & SAF-T in WinMENTOR — Configured Correctly from Day One

Automatic transmission to SPV ANAF, XML validation, error management, and SAF-T D406 — all configured and operational in 2 business days.

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Configuration in 2 business days

3-month error support included

SAF-T D406 included

Zero fines with us

How we configure e-Invoice in WinMENTOR

Standardized process, tested at hundreds of companies. No surprises.

Digital certificate

Obtaining or configuring qualified certificate for electronic signature in SPV ANAF

WinMENTOR configuration

SPV connection parameters, document type, invoice series, and account mapping

Transmission testing

Test invoice in ANAF test environment and confirmation verification

Production activation

Switch to SPV production environment and transmission of first real invoices

Monitoring & support

Transmission status dashboard, error alerts, and correction support in 4 hours

SAF-T D406 in WinMENTOR

Automatic D406 XML file generation, validation, and SPV submission. Support for the first 3 submissions included.

Account audit

Mapping WinMENTOR accounts to SAF-T ANAF taxonomy

Period configuration

Setting reporting period and taxpayer type

XML generation

D406 file generation and validation with ANAF validator

Submission & confirmation

SPV upload and reception confirmation

Common e-Invoice error codes

If you receive one of these codes, contact us — we resolve in maximum 4 hours.

Error code	Cause / solution
RO_EF-400	Invalid XML — missing field or wrong format
RO_EF-401	Invalid or inactive supplier/beneficiary TIN
RO_EF-403	Expired or invalid digital certificate
RO_EF-409	Duplicate invoice — number already transmitted
RO_EF-500	Internal ANAF error — retry

e-Invoice FAQ

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