diff --git a/composer.json b/composer.json
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--- /dev/null
+++ b/composer.json
@@ -0,0 +1,25 @@
+{
+    "name": "fdisotto/PartitaIVA",
+    "description": "Partita IVA checker",
+    "homepage": "https://github.com/fdisotto/partitaIva",
+    "type": "library",
+    "license": "MIT",
+    "authors": [
+        {
+            "name": "Fabio Di Sotto",
+            "email": "fabio.disotto@gmail.com"
+        }
+    ],
+    "require": {
+        "php": ">=5.3.0"
+    },
+    "require-dev": {
+        "phpunit/phpunit": "4.5.*"
+    },
+    "minimum-stability": "dev",
+    "autoload": {
+        "psr-0": {
+            "fdisotto": "src/"
+        }
+    }
+}
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diff --git a/example/index.php b/example/index.php
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--- /dev/null
+++ b/example/index.php
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+<?php
+require_once '../vendor/autoload.php';
+
+$pIva = new \fdisotto\PartitaIVA();
+
+var_dump($pIva->check('012345678'));
+
+var_dump($pIva->check('01234567891'));
\ No newline at end of file
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
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--- /dev/null
+++ b/phpunit.xml.dist
@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<phpunit backupGlobals="false"
+         backupStaticAttributes="false"
+         colors="true"
+         convertErrorsToExceptions="true"
+         convertNoticesToExceptions="true"
+         convertWarningsToExceptions="true"
+         processIsolation="false"
+         stopOnFailure="false"
+         syntaxCheck="true"
+         verbose="true"
+         bootstrap="vendor/autoload.php"
+>
+    <php>
+      <ini name="display_errors" value="on"/>
+    </php>
+
+    <testsuites>
+        <testsuite name="PHP MP4Box Tests Suite">
+            <directory>tests</directory>
+        </testsuite>
+    </testsuites>
+
+</phpunit>
\ No newline at end of file
diff --git a/src/fdisotto/PartitaIVA.php b/src/fdisotto/PartitaIVA.php
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--- /dev/null
+++ b/src/fdisotto/PartitaIVA.php
@@ -0,0 +1,55 @@
+<?php
+/**
+ * PartitaIva - Partita IVA checker
+ *
+ * @author      Fabio Di Sotto <fabio.disotto@gmail.com>
+ * @copyright   2015 Fabio Di Sotto
+ * @link        https://github.com/fdisotto/cac-api
+ * @version     1.0.0
+ *
+ * MIT LICENSE
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+namespace fdisotto;
+
+/**
+ * PartitaIVA
+ *
+ * Partita IVA checker
+ *
+ * @author Fabio Di Sotto
+ */
+class PartitaIVA
+{
+    /**
+     * Return the check result
+     *
+     * @param string $partitaIVA Partita IVA to check
+     * @return bool Check result
+     */
+    public function check($partitaIVA)
+    {
+        $pattern = "/^[0-9]{11}$/i";
+
+        return preg_match($pattern, trim($partitaIVA)) ? true : false;
+    }
+}
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diff --git a/tests/PartitaIVATest.php b/tests/PartitaIVATest.php
new file mode 100644
index 0000000..a24be42
--- /dev/null
+++ b/tests/PartitaIVATest.php
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+<?php
+class PartitaIVATest extends PHPUnit_Framework_TestCase
+{
+    private $pIva;
+
+    public function setUp()
+    {
+        $this->pIva = new \fdisotto\PartitaIVA();
+    }
+
+    public function testCheckTrue()
+    {
+        $this->assertTrue($this->pIva->check('01234567891'));
+    }
+
+    public function testCheckFalse()
+    {
+        $this->assertFalse($this->pIva->check('123456'));
+    }
+}
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