diff --git a/htdocs/expensereport/card.php b/htdocs/expensereport/card.php
index f76e96e78a1..c7cb9776aeb 100644
--- a/htdocs/expensereport/card.php
+++ b/htdocs/expensereport/card.php
@@ -996,6 +996,34 @@ 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);
@@ -2662,8 +2690,8 @@ if ($action != 'create' && $action != 'edit')
 	}
 
 
-	// If status is Appoved
-	// --------------------
+	// If status is Approved
+	// ---------------------
 
 	if ($user->rights->expensereport->approve && $object->fk_statut == ExpenseReport::STATUS_APPROVED)
 	{
@@ -2707,9 +2735,15 @@ if ($action != 'create' && $action != 'edit')
 	    print '<div class="inline-block divButAction"><a class="butAction" href="'.$_SERVER["PHP_SELF"].'?action=cancel&id='.$object->id.'">'.$langs->trans('Cancel').'</a></div>';
 	}
 
+	if ($user->rights->expensereport->to_paid && $object->paid && $object->fk_statut == ExpenseReport::STATUS_CLOSED)
+	{
+		// Set unpaid
+		print '<div class="inline-block divButAction"><a class="butAction" href="'.$_SERVER["PHP_SELF"].'?action=set_unpaid&id='.$object->id.'">'.$langs->trans('ClassifyUnPaid').'</a></div>';
+	}
+
 	// Clone
 	if ($user->rights->expensereport->creer) {
-	    print '<div class="inline-block divButAction"><a class="butAction" href="' . $_SERVER['PHP_SELF'] . '?id=' . $object->id . '&amp;action=clone">' . $langs->trans("ToClone") . '</a></div>';
+	    print '<div class="inline-block divButAction"><a class="butAction" href="' . $_SERVER['PHP_SELF'] . '?id=' . $object->id . '&action=clone">' . $langs->trans("ToClone") . '</a></div>';
 	}
 
 	/* If draft, validated, cancel, and user can create, he can always delete its card before it is approved */
diff --git a/htdocs/expensereport/class/expensereport.class.php b/htdocs/expensereport/class/expensereport.class.php
index 1160a6dcb94..dceb31c89fb 100644
--- a/htdocs/expensereport/class/expensereport.class.php
+++ b/htdocs/expensereport/class/expensereport.class.php
@@ -1397,12 +1397,12 @@ class ExpenseReport extends CommonObject
         // phpcs:enable
 		$error = 0;
 
-        if ($this->fk_c_deplacement_statuts != 5)
+		if ($this->paid)
         {
 			$this->db->begin();
 
             $sql = 'UPDATE '.MAIN_DB_PREFIX.$this->table_element;
-            $sql.= " SET fk_statut = 5";
+            $sql.= " SET paid = 0";
             $sql.= ' WHERE rowid = '.$this->id;
 
             dol_syslog(get_class($this)."::set_unpaid sql=".$sql, LOG_DEBUG);
diff --git a/htdocs/langs/en_US/bills.lang b/htdocs/langs/en_US/bills.lang
index 4b67ced59c9..ab4d9096df2 100644
--- a/htdocs/langs/en_US/bills.lang
+++ b/htdocs/langs/en_US/bills.lang
@@ -95,6 +95,7 @@ PaymentHigherThanReminderToPay=Payment higher than reminder to pay
 HelpPaymentHigherThanReminderToPay=Attention, the payment amount of one or more bills is higher than the outstanding amount to pay. <br> Edit your entry, otherwise confirm and consider creating a credit note for the excess received for each overpaid invoice.
 HelpPaymentHigherThanReminderToPaySupplier=Attention, the payment amount of one or more bills is higher than the outstanding amount to pay. <br> Edit your entry, otherwise confirm and consider creating a credit note for the excess paid for each overpaid invoice.
 ClassifyPaid=Classify 'Paid'
+ClassifyUnPaid=Classify 'Unpaid'
 ClassifyPaidPartially=Classify 'Paid partially'
 ClassifyCanceled=Classify 'Abandoned'
 ClassifyClosed=Classify 'Closed'
diff --git a/htdocs/langs/fr_FR/bills.lang b/htdocs/langs/fr_FR/bills.lang
index 41f5aca717c..ca251ed0d93 100644
--- a/htdocs/langs/fr_FR/bills.lang
+++ b/htdocs/langs/fr_FR/bills.lang
@@ -96,6 +96,7 @@ HelpPaymentHigherThanReminderToPay=Attention, le montant de paiement pour une ou
 HelpPaymentHigherThanReminderToPaySupplier=Attention, le montant de paiement pour une ou plusieurs factures est supérieur au reste à payer.<br>Corrigez votre saisie, sinon, confirmez et pensez à créer un avoir pour l'excédent pour chaque facture surpayée.
 ClassifyPaid=Classer 'Payée'
 ClassifyPaidPartially=Classer 'Payée partiellement'
+ClassifyUnPaid=Classer 'Non payée'
 ClassifyCanceled=Classer 'Abandonnée'
 ClassifyClosed=Classer 'Fermée'
 ClassifyUnBilled=Classer 'Non facturée'