diff --git a/core/lib/Thelia/Core/Form/Type/TheliaType.php b/core/lib/Thelia/Core/Form/Type/TheliaType.php
index 19524ec85..7aeeab3e0 100644
--- a/core/lib/Thelia/Core/Form/Type/TheliaType.php
+++ b/core/lib/Thelia/Core/Form/Type/TheliaType.php
@@ -39,7 +39,7 @@ class TheliaType extends AbstractType
 
     public function getParent()
     {
-        return 'form';
+        return 'text';
     }
 
     public function getName()
diff --git a/core/lib/Thelia/Core/Template/Smarty/Plugins/Form.php b/core/lib/Thelia/Core/Template/Smarty/Plugins/Form.php
index 7897b74a0..58fe2bf74 100755
--- a/core/lib/Thelia/Core/Template/Smarty/Plugins/Form.php
+++ b/core/lib/Thelia/Core/Template/Smarty/Plugins/Form.php
@@ -152,6 +152,7 @@ class Form extends AbstractSmartyPlugin
         }
 
         $template->assign("attr", implode(" ", $attr));
+        $template->assign("attr_list", $fieldVars["attr"]);
     }
 
     protected function assignFormTypeValues($template, $formFieldConfig, $formFieldView)
diff --git a/core/lib/Thelia/Form/TaxCreationForm.php b/core/lib/Thelia/Form/TaxCreationForm.php
index 901c459b3..ee9ef532d 100644
--- a/core/lib/Thelia/Form/TaxCreationForm.php
+++ b/core/lib/Thelia/Form/TaxCreationForm.php
@@ -55,13 +55,6 @@ class TaxCreationForm extends BaseForm
                 "required" => true,
                 "constraints" => array(
                     new Constraints\NotBlank(),
-                    new Constraints\Callback(
-                        array(
-                            "methods" => array(
-                                array($this, "verifyRequirements"),
-                            ),
-                        )
-                    ),
                 ),
                 "label" => Translator::getInstance()->trans("Type"),
                 "label_attr" => array("for" => "type_field"),
@@ -77,7 +70,7 @@ class TaxCreationForm extends BaseForm
                             new Constraints\Callback(
                                 array(
                                     "methods" => array(
-                                        array($this, "verifyRequirements"),
+                                        array($requirementType, "verifyForm"),
                                     ),
                                 )
                             ),
@@ -104,10 +97,10 @@ class TaxCreationForm extends BaseForm
         return "thelia_tax_creation";
     }
 
-    public function verifyRequirements($value, ExecutionContextInterface $context)
+    public function verifyForm($value, ExecutionContextInterface $context)
     {
         $in = true;
 
-
+        //$this->getForm()->getChildren()
     }
 }
diff --git a/core/lib/Thelia/Type/AlphaNumStringListType.php b/core/lib/Thelia/Type/AlphaNumStringListType.php
index 9205373ca..ccf21606d 100755
--- a/core/lib/Thelia/Type/AlphaNumStringListType.php
+++ b/core/lib/Thelia/Type/AlphaNumStringListType.php
@@ -28,7 +28,7 @@ namespace Thelia\Type;
  *
  */
 
-class AlphaNumStringListType implements TypeInterface
+class AlphaNumStringListType extends BaseType
 {
     public function getType()
     {
diff --git a/core/lib/Thelia/Type/AlphaNumStringType.php b/core/lib/Thelia/Type/AlphaNumStringType.php
index f574300cb..ad9595f20 100755
--- a/core/lib/Thelia/Type/AlphaNumStringType.php
+++ b/core/lib/Thelia/Type/AlphaNumStringType.php
@@ -28,7 +28,7 @@ namespace Thelia\Type;
  *
  */
 
-class AlphaNumStringType implements TypeInterface
+class AlphaNumStringType extends BaseType
 {
     public function getType()
     {
diff --git a/core/lib/Thelia/Type/AnyType.php b/core/lib/Thelia/Type/AnyType.php
index bf5349546..4e844c6e9 100755
--- a/core/lib/Thelia/Type/AnyType.php
+++ b/core/lib/Thelia/Type/AnyType.php
@@ -28,7 +28,7 @@ namespace Thelia\Type;
  *
  */
 
-class AnyType implements TypeInterface
+class AnyType extends BaseType
 {
     public function getType()
     {
diff --git a/core/lib/Thelia/Type/BaseType.php b/core/lib/Thelia/Type/BaseType.php
new file mode 100644
index 000000000..7ab1a86ec
--- /dev/null
+++ b/core/lib/Thelia/Type/BaseType.php
@@ -0,0 +1,46 @@
+<?php
+/*************************************************************************************/
+/*                                                                                   */
+/*      Thelia	                                                                     */
+/*                                                                                   */
+/*      Copyright (c) OpenStudio                                                     */
+/*      email : info@thelia.net                                                      */
+/*      web : http://www.thelia.net                                                  */
+/*                                                                                   */
+/*      This program is free software; you can redistribute it and/or modify         */
+/*      it under the terms of the GNU General Public License as published by         */
+/*      the Free Software Foundation; either version 3 of the License                */
+/*                                                                                   */
+/*      This program is distributed in the hope that it will be useful,              */
+/*      but WITHOUT ANY WARRANTY; without even the implied warranty of               */
+/*      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the                */
+/*      GNU General Public License for more details.                                 */
+/*                                                                                   */
+/*      You should have received a copy of the GNU General Public License            */
+/*	    along with this program. If not, see <http://www.gnu.org/licenses/>.         */
+/*                                                                                   */
+/*************************************************************************************/
+namespace Thelia\Type;
+
+use Symfony\Component\Validator\ExecutionContextInterface;
+
+/**
+ *
+ * @author Etienne Roudeix <eroudeix@openstudio.fr>
+ *
+ */
+abstract class BaseType implements TypeInterface
+{
+    abstract public function getType();
+    abstract public function isValid($value);
+    abstract public function getFormattedValue($value);
+    abstract public function getFormType();
+    abstract public function getFormOptions();
+
+    public function verifyForm($value, ExecutionContextInterface $context)
+    {
+        if( ! $this->isValid($value) ) {
+            $context->addViolation("Thelia Type not matched");
+        }
+    }
+}
diff --git a/core/lib/Thelia/Type/BooleanOrBothType.php b/core/lib/Thelia/Type/BooleanOrBothType.php
index eacd89ffc..25f3d9994 100755
--- a/core/lib/Thelia/Type/BooleanOrBothType.php
+++ b/core/lib/Thelia/Type/BooleanOrBothType.php
@@ -29,7 +29,7 @@ namespace Thelia\Type;
  *
  */
 
-class BooleanOrBothType implements TypeInterface
+class BooleanOrBothType extends BaseType
 {
 
     const ANY = '*';
diff --git a/core/lib/Thelia/Type/BooleanType.php b/core/lib/Thelia/Type/BooleanType.php
index e231ce26a..5f36453de 100755
--- a/core/lib/Thelia/Type/BooleanType.php
+++ b/core/lib/Thelia/Type/BooleanType.php
@@ -28,7 +28,7 @@ namespace Thelia\Type;
  *
  */
 
-class BooleanType implements TypeInterface
+class BooleanType extends BaseType
 {
     public function getType()
     {
diff --git a/core/lib/Thelia/Type/EnumListType.php b/core/lib/Thelia/Type/EnumListType.php
index 0d82e3a3e..5b54c48bf 100755
--- a/core/lib/Thelia/Type/EnumListType.php
+++ b/core/lib/Thelia/Type/EnumListType.php
@@ -28,7 +28,7 @@ namespace Thelia\Type;
  *
  */
 
-class EnumListType implements TypeInterface
+class EnumListType extends BaseType
 {
     protected $values = array();
 
diff --git a/core/lib/Thelia/Type/EnumType.php b/core/lib/Thelia/Type/EnumType.php
index 91f45a308..1283acde0 100755
--- a/core/lib/Thelia/Type/EnumType.php
+++ b/core/lib/Thelia/Type/EnumType.php
@@ -28,7 +28,7 @@ namespace Thelia\Type;
  *
  */
 
-class EnumType implements TypeInterface
+class EnumType extends BaseType
 {
     protected $values = array();
 
diff --git a/core/lib/Thelia/Type/FloatToFloatArrayType.php b/core/lib/Thelia/Type/FloatToFloatArrayType.php
index 404b7e4e4..f55997f55 100755
--- a/core/lib/Thelia/Type/FloatToFloatArrayType.php
+++ b/core/lib/Thelia/Type/FloatToFloatArrayType.php
@@ -28,7 +28,7 @@ namespace Thelia\Type;
  *
  */
 
-class FloatToFloatArrayType implements TypeInterface
+class FloatToFloatArrayType extends BaseType
 {
     public function getType()
     {
diff --git a/core/lib/Thelia/Type/FloatType.php b/core/lib/Thelia/Type/FloatType.php
index 74d71adfb..830622a86 100755
--- a/core/lib/Thelia/Type/FloatType.php
+++ b/core/lib/Thelia/Type/FloatType.php
@@ -28,7 +28,7 @@ namespace Thelia\Type;
  *
  */
 
-class FloatType implements TypeInterface
+class FloatType extends BaseType
 {
     public function getType()
     {
diff --git a/core/lib/Thelia/Type/IntListType.php b/core/lib/Thelia/Type/IntListType.php
index ff87bbd4e..5fe31aa3c 100755
--- a/core/lib/Thelia/Type/IntListType.php
+++ b/core/lib/Thelia/Type/IntListType.php
@@ -28,7 +28,7 @@ namespace Thelia\Type;
  *
  */
 
-class IntListType implements TypeInterface
+class IntListType extends BaseType
 {
     public function getType()
     {
diff --git a/core/lib/Thelia/Type/IntToCombinedIntsListType.php b/core/lib/Thelia/Type/IntToCombinedIntsListType.php
index dfa21310d..562e160dd 100755
--- a/core/lib/Thelia/Type/IntToCombinedIntsListType.php
+++ b/core/lib/Thelia/Type/IntToCombinedIntsListType.php
@@ -28,7 +28,7 @@ namespace Thelia\Type;
  *
  */
 
-class IntToCombinedIntsListType implements TypeInterface
+class IntToCombinedIntsListType extends BaseType
 {
     public function getType()
     {
diff --git a/core/lib/Thelia/Type/IntToCombinedStringsListType.php b/core/lib/Thelia/Type/IntToCombinedStringsListType.php
index 38152fdaa..5c4327dc8 100755
--- a/core/lib/Thelia/Type/IntToCombinedStringsListType.php
+++ b/core/lib/Thelia/Type/IntToCombinedStringsListType.php
@@ -28,7 +28,7 @@ namespace Thelia\Type;
  *
  */
 
-class IntToCombinedStringsListType implements TypeInterface
+class IntToCombinedStringsListType extends BaseType
 {
     public function getType()
     {
diff --git a/core/lib/Thelia/Type/IntType.php b/core/lib/Thelia/Type/IntType.php
index 7a06a50fb..5aa146e60 100755
--- a/core/lib/Thelia/Type/IntType.php
+++ b/core/lib/Thelia/Type/IntType.php
@@ -28,7 +28,7 @@ namespace Thelia\Type;
  *
  */
 
-class IntType implements TypeInterface
+class IntType extends BaseType
 {
     public function getType()
     {
diff --git a/core/lib/Thelia/Type/JsonType.php b/core/lib/Thelia/Type/JsonType.php
index a1a1f5af6..502a43953 100755
--- a/core/lib/Thelia/Type/JsonType.php
+++ b/core/lib/Thelia/Type/JsonType.php
@@ -28,7 +28,7 @@ namespace Thelia\Type;
  *
  */
 
-class JsonType implements TypeInterface
+class JsonType extends BaseType
 {
     public function getType()
     {
diff --git a/core/lib/Thelia/Type/ModelType.php b/core/lib/Thelia/Type/ModelType.php
index dadd47308..a8ab8c553 100755
--- a/core/lib/Thelia/Type/ModelType.php
+++ b/core/lib/Thelia/Type/ModelType.php
@@ -30,7 +30,7 @@ use Thelia\Exception\TypeException;
  * @author Etienne Roudeix <eroudeix@openstudio.fr>
  *
  */
-class ModelType implements TypeInterface
+class ModelType extends BaseType
 {
     protected $expectedModelActiveRecord = null;
 
diff --git a/core/lib/Thelia/Type/ModelValidIdType.php b/core/lib/Thelia/Type/ModelValidIdType.php
index 16a39359e..a9bfec7b5 100755
--- a/core/lib/Thelia/Type/ModelValidIdType.php
+++ b/core/lib/Thelia/Type/ModelValidIdType.php
@@ -30,7 +30,7 @@ use Thelia\Exception\TypeException;
  * @author Etienne Roudeix <eroudeix@openstudio.fr>
  *
  */
-class ModelValidIdType implements TypeInterface
+class ModelValidIdType extends BaseType
 {
     protected $expectedModelActiveRecordQuery = null;
 
diff --git a/core/lib/Thelia/Type/TypeInterface.php b/core/lib/Thelia/Type/TypeInterface.php
index 642c6d935..99e2f77e0 100755
--- a/core/lib/Thelia/Type/TypeInterface.php
+++ b/core/lib/Thelia/Type/TypeInterface.php
@@ -22,12 +22,13 @@
 /*************************************************************************************/
 namespace Thelia\Type;
 
+use Symfony\Component\Validator\ExecutionContextInterface;
+
 /**
  *
  * @author Etienne Roudeix <eroudeix@openstudio.fr>
  *
  */
-
 interface TypeInterface
 {
     public function getType();
@@ -38,4 +39,5 @@ interface TypeInterface
 
     public function getFormType();
     public function getFormOptions();
+    public function verifyForm($value, ExecutionContextInterface $context);
 }
diff --git a/templates/admin/default/tax-edit.html b/templates/admin/default/tax-edit.html
index 07a18a111..2bb0b260e 100644
--- a/templates/admin/default/tax-edit.html
+++ b/templates/admin/default/tax-edit.html
@@ -88,7 +88,7 @@
                     {form_tagged_fields form=$form tag='requirements'}
                         <div class="form-group {if $error}has-error{/if} js-tax-requirements" data-tax-type="{$data.tax_type}" {if $data.tax_type != $TYPE}style="display: none"{/if}>
                             <label for="{$label_attr.for}" class="control-label">
-                                {intl l=$label} :
+                                {intl l=$label} : {$formType}
                             </label>
                             {if $formType == 'choice'}
                                 <select name="{$name}">