diff --git a/application/ajaxwebpage.class.inc.php b/application/ajaxwebpage.class.inc.php
index 486ecd4ee..7f06e4fde 100644
--- a/application/ajaxwebpage.class.inc.php
+++ b/application/ajaxwebpage.class.inc.php
@@ -5,7 +5,8 @@
  * @copyright   Copyright (C) 2010-2021 Combodo SARL
  */
 
-DeprecatedCallsLog::NotifyDeprecatedFile('moved to sources/application/WebPage/AjaxPage.php, now loadable using autoloader');
+// cannot notify depreciation for now as this is still MASSIVELY used in iTop core !
+//DeprecatedCallsLog::NotifyDeprecatedFile('moved to sources/application/WebPage/AjaxPage.php, now loadable using autoloader');
 
 /**
  * Class ajax_page
diff --git a/core/metamodel.class.php b/core/metamodel.class.php
index f392dbf56..03f31482a 100644
--- a/core/metamodel.class.php
+++ b/core/metamodel.class.php
@@ -1420,7 +1420,8 @@ abstract class MetaModel
 	 */
 	final public static function GetFiltersList($sClass)
 	{
-		DeprecatedCallsLog::NotifyDeprecatedPhpMethod('do not use : dead code, will be removed in the future');
+		// cannot notify depreciation for now as this is still MASSIVELY used in iTop core !
+		//DeprecatedCallsLog::NotifyDeprecatedPhpMethod('do not use : dead code, will be removed in the future');
 		self::_check_subclass($sClass);
 
 		return array_keys(self::$m_aFilterDefs[$sClass]);
@@ -1529,7 +1530,8 @@ abstract class MetaModel
 	 */
 	final public static function IsValidFilterCode($sClass, $sFilterCode)
 	{
-		DeprecatedCallsLog::NotifyDeprecatedPhpMethod('do not use : dead code, will be removed in the future');
+		// cannot notify depreciation for now as this is still MASSIVELY used in iTop core !
+		//DeprecatedCallsLog::NotifyDeprecatedPhpMethod('do not use : dead code, will be removed in the future');
 		if (!array_key_exists($sClass, self::$m_aFilterDefs)) {
 			return false;
 		}
@@ -1841,7 +1843,8 @@ abstract class MetaModel
 	 */
 	public static function GetClassFilterDefs($sClass)
 	{
-		DeprecatedCallsLog::NotifyDeprecatedPhpMethod('do not use : dead code, will be removed in the future');
+		// cannot notify depreciation for now as this is still MASSIVELY used in iTop core !
+		//DeprecatedCallsLog::NotifyDeprecatedPhpMethod('do not use : dead code, will be removed in the future');
 		self::_check_subclass($sClass);
 
 		return self::$m_aFilterDefs[$sClass];
diff --git a/core/oql/expression.class.inc.php b/core/oql/expression.class.inc.php
index ff1070d23..089a70e71 100644
--- a/core/oql/expression.class.inc.php
+++ b/core/oql/expression.class.inc.php
@@ -117,7 +117,8 @@ abstract class Expression {
 	 */
 	public function Render(&$aArgs = null, $bRetrofitParams = false)
 	{
-		DeprecatedCallsLog::NotifyDeprecatedPhpMethod('use RenderExpression');
+		// cannot notify depreciation for now as this is still MASSIVELY used in iTop core !
+		//DeprecatedCallsLog::NotifyDeprecatedPhpMethod('use RenderExpression');
 
 		return $this->RenderExpression(false, $aArgs, $bRetrofitParams);
 	}