FastPII is a production-grade PII detection SDK for European personal identifiers. It detects, validates, and transforms PII in text using checksum validation for identifiers like rodné číslo, PESEL, Steuer-ID, and SIREN.

How do I install FastPII?

Install FastPII with pip: pip install fastpii. It requires Python 3.10 or newer and has zero core dependencies.

What countries does FastPII support?

FastPII supports 4 regions: Czech Republic (15 detectors), Poland (6 detectors), Germany (6 detectors), and France (6 detectors). This includes identifiers like rodné číslo, IČO, DIČ, PESEL, NIP, REGON, Steuer-ID, USt-IdNr, SIREN, SIRET, and INSEE/NIR.

Does FastPII have external dependencies?

No. FastPII has zero core dependencies. Optional integrations like FastAPI and LangChain are available through pip extras: pip install fastpii[fastapi] or pip install fastpii[langchain].

How does FastPII validate identifiers?

FastPII uses country-specific checksum algorithms: Mod 11 for rodné číslo and IČO, Mod 10 for PESEL, ISO 7064 MOD 11,10 for Steuer-ID, Luhn for SIREN/SIRET, and Mod-97 for INSEE/NIR. This ensures only structurally valid identifiers are detected.

Postal Code (PL) - FastPII Docs

Name: FastPII SDK
Author: FastPII

Purpose

Use the postal_code detector (region pl) for Polish postal codes (kod pocztowy).

This detector uses pattern matching with Polish postal code format validation.

Detector Name

postal_code

Region: pl

Supported Formats

DD-DDD (standard 5-digit format with hyphen)
DDDDD (5-digit format without hyphen)

Polish postal codes always start with digits 00-99 representing postal regions.

Usage

from fastpii import FastPII, DEFAULT_PRIORITY
from fastpii.countries.pl import PolishPack

engine = FastPII(priority=DEFAULT_PRIORITY)
engine.register(PolishPack())

result = engine.detect("kod pocztowy 00-950 Warszawa")

Validation

result = engine.validate("00-950", "postal_code")
# result.is_valid → True

Metadata

Region code format validation
Hyphen-normalized output

Postal Code (PL)