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[Validation & Sanitization](/categories/validation) 4. / 5. rechtlogisch/ust-id ActiveLibrary[Validation & Sanitization](/categories/validation) rechtlogisch/ust-id =================== Validates the German VAT-ID (Umsatzsteuer-Identifikationsnummer) v1.2.0(10mo ago)011MITPHPPHP ^8.2CI passing Since Jul 9Pushed 5mo ago1 watchersCompare [ Source](https://github.com/rechtlogisch/ust-id)[ Packagist](https://packagist.org/packages/rechtlogisch/ust-id)[ Docs](https://github.com/rechtlogisch/ust-id)[ RSS](/packages/rechtlogisch-ust-id/feed)WikiDiscussions main Synced 1mo ago READMEChangelog (3)Dependencies (5)Versions (4)Used By (0) [![Recht logisch USt-ID banner image](rechtlogisch-ust-id-banner.png)](rechtlogisch-ust-id-banner.png) [![Latest Version on Packagist](https://camo.githubusercontent.com/962e35f82988b6532aa8953c428dbd9444d94aa501c87927a6cd8377d3f9c769/68747470733a2f2f696d672e736869656c64732e696f2f7061636b61676973742f762f72656368746c6f67697363682f7573742d69642e7376673f7374796c653d666c61742d737175617265)](https://packagist.org/packages/rechtlogisch/ust-id)[![Tests](https://github.com/rechtlogisch/ust-id/actions/workflows/run-tests.yml/badge.svg?branch=main)](https://github.com/rechtlogisch/ust-id/actions/workflows/run-tests.yml)[![Total Downloads](https://camo.githubusercontent.com/2e2618eec99e9b49c625f58448c84f64dcff7d740877a0c52119a53302693767/68747470733a2f2f696d672e736869656c64732e696f2f7061636b61676973742f64742f72656368746c6f67697363682f7573742d69642e7376673f7374796c653d666c61742d737175617265)](https://packagist.org/packages/rechtlogisch/ust-id) ust-id ====== [](#ust-id) > Validates the German VAT-ID (Umsatzsteuer-Identifikationsnummer, short: USt-ID) Check digit (last digit) is validated based on [ISO/IEC 7064, MOD 11,10](https://www.iso.org/standard/31531.html) as documented within the meanwhile repealed "Datenträger-Verordnung über die Abgabe Zusammenfassender Meldungen – ZMDV" dated 13.05.1993 ([BGBl. I S. 736](https://www.bgbl.de/xaver/bgbl/start.xav?start=%2F%2F*%5B%40attr_id%3D%27bgbl193s0726.pdf%27%5D#__bgbl__%2F%2F*%5B%40attr_id%3D%27bgbl193s0726.pdf%27%5D__1720528216746)). Note This package validates solely the syntax and check digit of the provided input. It does not confirm, that the provided USt-ID was assigned to an entrepreneur. Please use the official [VIES](https://ec.europa.eu/taxation_customs/vies/) service for that. Installation ------------ [](#installation) You can install the package via composer: ``` composer require rechtlogisch/ust-id ``` Usage ----- [](#usage) ``` isUstIdValid('DE123456788'); // => true ``` or ``` use Rechtlogisch\UstId\UstId; (new UstId('DE123456788')) ->validate() // ValidationResult::class ->isValid(); // => true ``` Validation errors ----------------- [](#validation-errors) You can get a list of errors explaining why the provided input is invalid. The `validate()` method returns a DTO with a `getErrors()` method. Note The keys of `getErrors()` hold the stringified reference to the exception class. You can check for a particular error by comparing to the ::class constant. For example: `Rechtlogisch\UstId\Exceptions\InvalidUstIdLength::class`. ``` validateUstId('DE12345678')->getErrors(); // [ // 'Rechtlogisch\UstId\Exceptions\InvalidUstIdLength' // => 'USt-ID must be 11 characters long. Provided USt-ID is: 10 characters long.', // ] ``` or ``` use Rechtlogisch\UstId\UstId; (new UstId('DE12345678')) ->validate() ->getErrors(); // [ // 'Rechtlogisch\UstId\Exceptions\InvalidUstIdLength' // => 'USt-ID must be 11 characters long. Provided USt-ID is: 10 characters long.', // ] ``` Testing ------- [](#testing) ``` composer test ``` Changelog --------- [](#changelog) Please see [CHANGELOG](CHANGELOG.md) for more information on what has changed recently. Contributing ------------ [](#contributing) Please see [CONTRIBUTING](https://github.com/rechtlogisch/.github/blob/main/CONTRIBUTING.md) for details. Security Vulnerabilities ------------------------ [](#security-vulnerabilities) If you discover any security-related issues, please email instead of using the issue tracker. Credits ------- [](#credits) - [Krzysztof Tomasz Zembrowski](https://github.com/zembrowski) - [All Contributors](../../contributors) License ------- [](#license) The MIT License (MIT). Please see [License File](LICENSE.md) for more information. ### Health Score 35 — LowBetter than 80% of packages Maintenance63 Regular maintenance activity Popularity5 Limited adoption so far Community10 Small or concentrated contributor base Maturity54 Maturing project, gaining track record Bus Factor1 Top contributor holds 58.3% of commits — single point of failure How is this calculated?**Maintenance (25%)** — Last commit recency, latest release date, and issue-to-star ratio. Uses a 2-year decay window. **Popularity (30%)** — Total and monthly downloads, GitHub stars, and forks. Logarithmic scaling prevents top-heavy scores. **Community (15%)** — Contributors, dependents, forks, watchers, and maintainers. Measures real ecosystem engagement. **Maturity (30%)** — Project age, version count, PHP version support, and release stability. ### Release Activity Cadence Every ~171 days Total 3 Last Release 328d ago PHP version history (2 changes)v1.0.0PHP ^8.1 v1.2.0PHP ^8.2 ### Community Maintainers ![](https://www.gravatar.com/avatar/4f60f360e9d79540ea00427585d1b0063f2c1125ef8d22be6939428ffb68ccc1?d=identicon)[rechtlogisch](/maintainers/rechtlogisch) --- Top Contributors [![zembrowski](https://avatars.githubusercontent.com/u/2451083?v=4)](https://github.com/zembrowski "zembrowski (14 commits)")[![dependabot[bot]](https://avatars.githubusercontent.com/in/29110?v=4)](https://github.com/dependabot[bot] "dependabot[bot] (9 commits)")[![github-actions[bot]](https://avatars.githubusercontent.com/in/15368?v=4)](https://github.com/github-actions[bot] "github-actions[bot] (1 commits)") --- Tags germanyphpust-idvalidatevat-idVAT IDgermanyrechtlogischust-idumsatzsteuer-identifikationsnummer ### Code Quality TestsPest Static AnalysisPHPStan Code StyleLaravel Pint Type Coverage Yes ### Embed Badge ![Health badge](/badges/rechtlogisch-ust-id/health.svg) ``` [![Health](https://phpackages.com/badges/rechtlogisch-ust-id/health.svg)](https://phpackages.com/packages/rechtlogisch-ust-id) ``` ### Alternatives [webmozart/assert Assertions to validate method input/output with nice error messages. 7.6k894.0M1.2k](/packages/webmozart-assert)[swaggest/json-schema High definition PHP structures with JSON-schema based validation 48612.5M73](/packages/swaggest-json-schema)[stevebauman/purify An HTML Purifier / Sanitizer for Laravel 5325.6M19](/packages/stevebauman-purify)[ashallendesign/laravel-config-validator A package for validating your Laravel app's config. 217905.3k5](/packages/ashallendesign-laravel-config-validator)[crazybooot/base64-validation Laravel validators for base64 encoded files 1341.9M8](/packages/crazybooot-base64-validation)[xemlock/htmlpurifier-html5 HTML5 support for HTML Purifier 1052.9M11](/packages/xemlock-htmlpurifier-html5) PHPackages © 2026 [Directory](/)[Categories](/categories)[Trending](/trending)[Changelog](/changelog)[Analyze](/analyze)