diff --git a/htdocs/core/class/commonsignedobject.php b/htdocs/core/class/commonsignedobject.php
index 446244b6144..ec8a62b8cad 100644
--- a/htdocs/core/class/commonsignedobject.php
+++ b/htdocs/core/class/commonsignedobject.php
@@ -23,40 +23,16 @@
 
 /**
  * Trait for common signed business objects
+ * @property DoliDB db
+ * @property static oldcopy
+ * @property int id
+ * @property string error
+ * @property string table_element
+ * @property array<string,mixed> context
  * @method int call_trigger(string $triggerName, User $user)
  */
 trait CommonSignedObject
 {
-	/**
-	 * @var DoliDB		Database handler (result of a new DoliDB)
-	 */
-	public $db;
-
-	/**
-	 * @var int			The object identifier
-	 */
-	public $id;
-
-	/**
-	 * @var string		Error string
-	 */
-	public $error;
-
-	/**
-	 * @var string 		Name of table without prefix where object is stored
-	 */
-	public $table_element;
-
-	/**
-	 * @var ?static		To store a cloned copy of the object before editing it (to keep track of its former properties)
-	 */
-	public $oldcopy;
-
-	/**
-	 * @var array<string,mixed>		Can be used to pass information when only the object is provided to the method
-	 */
-	public $context = array();
-
 	/**
 	 * Status of the contract (0=NoSignature, 1=SignedBySender, 2=SignedByReceiver, 9=SignedByAll)
 	 * @var int