diff --git a/src/Payline/PaylineSDK.php b/src/Payline/PaylineSDK.php
index 659663b..c1c699c 100644
--- a/src/Payline/PaylineSDK.php
+++ b/src/Payline/PaylineSDK.php
@@ -870,6 +870,7 @@ private function formatRequest(&$array)
             $array['buyer']['billingAddress'] = $array['billingAddress'];
         }
 
+        //Backward Compatibility, take account of misspelling. "shippingAdress" versus "shippingAddress"
         if (!isset($array['buyer']['shippingAdress']) && isset($array['buyer']['shippingAddress'])) {
             $array['buyer']['shippingAdress'] = $array['buyer']['shippingAddress'];
         }
diff --git a/src/Payline/SoapVarFactory.php b/src/Payline/SoapVarFactory.php
index eb76e82..11d5ecb 100644
--- a/src/Payline/SoapVarFactory.php
+++ b/src/Payline/SoapVarFactory.php
@@ -4,6 +4,9 @@
 
 class SoapVarFactory
 {
+    /**
+     * Basename namespace for WSDLs objects
+     */
     const ROOT_CLASSNAME = "Payline\\Objects\\";
 
     /**
@@ -72,6 +75,15 @@ public function createObject($elementKey, $data=null, $baseClassname=null) {
         return $newObject;
     }
 
+    /**
+     * Get SOAP var type
+     * Should be same type as base classname
+     * Manage exceptions: Buyer/BillingAddress, Buyer/ShippingAdress and Wallet/ShippingAddress
+     *
+     * @param $elementKey
+     * @param $baseClassname
+     * @return mixed|string
+     */
     protected function getSoapVarType($elementKey, $baseClassname) {
         $soapVarType = $elementKey;
         if($className = $this->getPaylineClassname($elementKey, $baseClassname) ) {