Developer publishes field guide to decoding Romania's e-Factura ANAF rejection errors

Romania's mandatory e-Factura system requires businesses and developers to submit invoices via ANAF's SOAP endpoints, and rejections are common but often poorly explained. A developer has published a practical guide identifying four main rejection categories: schema or RO_CIUS validation failures, missing or malformed mandatory fields, certificate and OAuth lifecycle issues, and delayed SPV processing rejections. RO_CIUS is Romania's national customization of the EU invoice standard EN 16931, and an XML file can pass standard UBL validation yet still be rejected because RO_CIUS enforces additional country-specific rules. The guide recommends using a plain-language validator to pinpoint the exact field or rule causing a rejection, rather than relying on cryptic rule-reference codes. The author also notes that the full ANAF submission workflow — including certificate authentication, OAuth token management, and asynchronous polling — adds significant complexity beyond XML formatting alone.