diff --git a/htdocs/core/triggers/interface_20_modWorkflow_WorkflowManager.class.php b/htdocs/core/triggers/interface_20_modWorkflow_WorkflowManager.class.php
index 2c647d82575..3af9319c7fa 100644
--- a/htdocs/core/triggers/interface_20_modWorkflow_WorkflowManager.class.php
+++ b/htdocs/core/triggers/interface_20_modWorkflow_WorkflowManager.class.php
@@ -130,7 +130,8 @@ class InterfaceWorkflowManager extends DolibarrTriggers
         if ($action == 'BILL_VALIDATE')
         {
         	dol_syslog( "Trigger '".$this->name."' for action '$action' launched by ".__FILE__.". id=".$object->id );
-
+        	$ret = 0;
+        	
 			// First classify billed the order to allow the proposal classify process
 			if (! empty($conf->commande->enabled) && ! empty($conf->workflow->enabled) && ! empty($conf->global->WORKFLOW_INVOICE_AMOUNT_CLASSIFY_BILLED_ORDER))
         	{
@@ -151,7 +152,6 @@ class InterfaceWorkflowManager extends DolibarrTriggers
         		        }
         		    }
         		}
-        		return $ret;
         	}
 
 			// Second classify billed the proposal.
@@ -174,8 +174,9 @@ class InterfaceWorkflowManager extends DolibarrTriggers
         		        }
         		    }
         		}
-        		return $ret;
         	}
+        	
+        	return $ret;
         }
 
         // classify billed order & billed propososal
diff --git a/htdocs/expensereport/card.php b/htdocs/expensereport/card.php
index 14e86c49cb6..e2d1b29772d 100644
--- a/htdocs/expensereport/card.php
+++ b/htdocs/expensereport/card.php
@@ -1017,6 +1017,34 @@ if (empty($reshook))
     	}
     }
 
+    if ($action == 'set_unpaid' && $id > 0 && $user->rights->expensereport->to_paid)
+    {
+    	$object = new ExpenseReport($db);
+    	$object->fetch($id);
+
+    	$result = $object->set_unpaid($user);
+
+    	if ($result > 0)
+    	{
+    		// Define output language
+    		if (empty($conf->global->MAIN_DISABLE_PDF_AUTOUPDATE))
+    		{
+    			$outputlangs = $langs;
+    			$newlang = '';
+    			if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) $newlang = GETPOST('lang_id', 'aZ09');
+    			if ($conf->global->MAIN_MULTILANGS && empty($newlang))	$newlang = $object->thirdparty->default_lang;
+    			if (! empty($newlang)) {
+    				$outputlangs = new Translate("", $conf);
+    				$outputlangs->setDefaultLang($newlang);
+    			}
+    			$model=$object->modelpdf;
+    			$ret = $object->fetch($id); // Reload to get new records
+
+    			$object->generateDocument($model, $outputlangs, $hidedetails, $hidedesc, $hideref);
+    		}
+    	}
+    }
+
     if ($action == 'set_paid' && $id > 0 && $user->rights->expensereport->to_paid)
     {
     	$object = new ExpenseReport($db);
diff --git a/htdocs/livraison/card.php b/htdocs/livraison/card.php
index aec52404bd1..2889cbfe5a9 100644
--- a/htdocs/livraison/card.php
+++ b/htdocs/livraison/card.php
@@ -568,7 +568,7 @@ else
 			}
 
 			// Other attributes
-			if ($action = 'create_delivery') {
+			if ($action == 'create_delivery') {
 				// copy from expedition
 				$expeditionExtrafields = new Extrafields($db);
 				$expeditionExtrafieldLabels = $expeditionExtrafields->fetch_name_optionals_label($expedition->table_element);
@@ -681,7 +681,7 @@ else
 						$mode = ($object->statut == 0) ? 'edit' : 'view';
 						$line = new LivraisonLigne($db);
 						$line->fetch_optionals($object->lines[$i]->id);
-						if ($action = 'create_delivery') {
+						if ($action == 'create_delivery') {
 							$srcLine = new ExpeditionLigne($db);
 							$expeditionLineExtrafields = new Extrafields($db);
 							$expeditionLineExtrafieldLabels = $expeditionLineExtrafields->fetch_name_optionals_label($srcLine->table_element);