# VF-1220

Source: https://xmlvalid.com/rules/VF-1220

> El valor del campo NombreSistemaInformatico es incorrecto.

- Level: error
- Rule sets: VERI*FACTU checks of the AEAT Validaciones 1.2.2 (8 April 2026)
- Context: `/*:RegFactuSistemaFacturacion/*:RegistroFactura/*/*:SistemaInformatico`
- Test: `normalize-space(*:NombreSistemaInformatico) != ''`

In English: NombreSistemaInformatico is empty.

Validate a document against these rules: https://xmlvalid.com/validate