diff --git a/workflow/engine/classes/model/ProcessCategory.php b/workflow/engine/classes/model/ProcessCategory.php
index c293374e3..b0de98507 100755
--- a/workflow/engine/classes/model/ProcessCategory.php
+++ b/workflow/engine/classes/model/ProcessCategory.php
@@ -54,5 +54,11 @@ class ProcessCategory extends BaseProcessCategory
         $aRow = $dataset->getRow();
         return $aRow;
     }
+
+    public function exists ($catUid)
+    {
+        $oProCat = ProcessCategoryPeer::retrieveByPk( $catUid );
+        return (is_object( $oProCat ) && get_class( $oProCat ) == 'ProcessCategory');
+    }
 }
 
diff --git a/workflow/engine/src/BusinessModel/Validator.php b/workflow/engine/src/BusinessModel/Validator.php
index 85324878e..de3b01f1c 100644
--- a/workflow/engine/src/BusinessModel/Validator.php
+++ b/workflow/engine/src/BusinessModel/Validator.php
@@ -171,6 +171,56 @@ class Validator{
         return $tri_uid;
     }
 
+    /**
+     * Validate pro_uid
+     *
+     * @param string $pro_uid, Uid for process
+     * @param string $nameField . Name of field for message
+     *
+     * @access public
+     * @author Brayan Pereyra (Cochalo) <brayan@colosa.com>
+     * @copyright Colosa - Bolivia
+     *
+     * @return string
+     */
+    static public function proUid($pro_uid, $nameField = 'pro_uid')
+    {
+        $pro_uid = trim($pro_uid);
+        if ($pro_uid == '') {
+            throw (new \Exception("The process with $nameField: '' does not exist."));
+        }
+        $oProcess = new \Process();
+        if (!($oProcess->exists($pro_uid))) {
+            throw (new \Exception("The process with $nameField: '$pro_uid' does not exist."));
+        }
+        return $pro_uid;
+    }
+
+    /**
+     * Validate cat_uid
+     *
+     * @param string $cat_uid, Uid for category
+     * @param string $nameField . Name of field for message
+     *
+     * @access public
+     * @author Brayan Pereyra (Cochalo) <brayan@colosa.com>
+     * @copyright Colosa - Bolivia
+     *
+     * @return string
+     */
+    static public function catUid($cat_uid, $nameField = 'cat_uid')
+    {
+        $cat_uid = trim($cat_uid);
+        if ($cat_uid == '') {
+            throw (new \Exception("The category with $nameField: '' does not exist."));
+        }
+        $oCategory = new \ProcessCategory();
+        if (!($oCategory->exists($cat_uid))) {
+            throw (new \Exception("The category with $nameField: '$cat_uid' does not exist."));
+        }
+        return $cat_uid;
+    }
+
     /**
      * Validate date
      *