NIF Generator

Portuguese taxpayer number (NIF) — 9 digits with an official check digit.

Portugal Validation Generation

Try the demo NuGet: DocumentNumber.Portugal.Vat.Generator

How generation works

The NIF generator builds a structurally valid sample using the same rules the validator enforces — check digits included. Use it for test data and fixtures; never for production records.

Install the package

bash

dotnet add package DocumentNumber.Portugal.Vat.Generator

Generator in C#

Program.cs

using DocumentNumber.Portugal.Vat.Generator;

var generator = new VatGenerator();
var sample = generator.GenerateDocumentNumber();

Console.WriteLine(sample);

Live example

798945320 — a real NIF value accepted by the validator

Try NIF generation

Runs the exact same library code your application uses. Nothing you enter is stored.

Frequently asked questions

What is NIF?

Portuguese taxpayer number (NIF) — 9 digits with an official check digit.

How does NIF generation work?

The generator builds a structurally valid NIF sample using the same rules the validator enforces — including check digits. Generated values are intended for tests and development only.

How do I install the NIF generator package?

dotnet add package DocumentNumber.Portugal.Vat.Generator

Is the value I enter in the demo stored?

No. Demo inputs are processed in memory for the current request only and are never persisted or shared.