diff --git a/htdocs/comm/action/card.php b/htdocs/comm/action/card.php
index 245f90edf72..461002029ae 100644
--- a/htdocs/comm/action/card.php
+++ b/htdocs/comm/action/card.php
@@ -70,6 +70,10 @@ $offsetvalue = GETPOST('offsetvalue', 'int');
 $offsetunit = GETPOST('offsetunittype_duration', 'aZ09');
 $remindertype = GETPOST('selectremindertype', 'aZ09');
 $modelmail = GETPOST('actioncommsendmodel_mail', 'int');
+$complete = GETPOST('complete', 'alpha');	// 'na' must be allowed
+if ($complete == 'na' || $complete == -2) {
+	$complete = -1;
+}
 
 $datep = dol_mktime($fulldayevent ? '00' : $aphour, $fulldayevent ? '00' : $apmin, 0, GETPOST("apmonth", 'int'), GETPOST("apday", 'int'), GETPOST("apyear", 'int'));
 $datef = dol_mktime($fulldayevent ? '23' : $p2hour, $fulldayevent ? '59' : $p2min, $fulldayevent ? '59' : '0', GETPOST("p2month", 'int'), GETPOST("p2day", 'int'), GETPOST("p2year", 'int'));
@@ -240,7 +244,7 @@ if (empty($reshook) && $action == 'add') {
 		exit;
 	}
 
-	$percentage = in_array(GETPOST('status'), array(-1, 100)) ?GETPOST('status') : (in_array(GETPOST('complete'), array(-1, 100)) ?GETPOST('complete') : GETPOST("percentage")); // If status is -1 or 100, percentage is not defined and we must use status
+	$percentage = in_array(GETPOST('status'), array(-1, 100)) ? GETPOST('status') : (in_array($complete, array(-1, 100)) ? $complete : GETPOST("percentage", 'int')); // If status is -1 or 100, percentage is not defined and we must use status
 
 	// Clean parameters
 	$datep = dol_mktime($fulldayevent ? '00' : GETPOST("aphour", 'int'), $fulldayevent ? '00' : GETPOST("apmin", 'int'), $fulldayevent ? '00' : GETPOST("apsec", 'int'), GETPOST("apmonth", 'int'), GETPOST("apday", 'int'), GETPOST("apyear", 'int'), 'tzuser');
@@ -471,7 +475,7 @@ if (empty($reshook) && $action == 'update') {
 		$apmin = GETPOST('apmin', 'int');
 		$p2hour = GETPOST('p2hour', 'int');
 		$p2min = GETPOST('p2min', 'int');
-		$percentage = in_array(GETPOST('status'), array(-1, 100)) ?GETPOST('status') : (in_array(GETPOST('complete'), array(-1, 100)) ?GETPOST('complete') : GETPOST("percentage")); // If status is -1 or 100, percentage is not defined and we must use status
+		$percentage = in_array(GETPOST('status'), array(-1, 100)) ? GETPOST('status') : (in_array($complete, array(-1, 100)) ? $complete : GETPOST("percentage", 'int')); // If status is -1 or 100, percentage is not defined and we must use status
 
 		// Clean parameters
 		if ($aphour == -1) {
@@ -1074,15 +1078,15 @@ if ($action == 'create') {
 	// Status
 	print '<tr><td>'.$langs->trans("Status").' / '.$langs->trans("Percentage").'</td>';
 	print '<td>';
-	$percent = GETPOST('complete')!=='' ? GETPOST('complete') : -1;
+	$percent = $complete !=='' ? $complete : -1;
 	if (GETPOSTISSET('status')) {
 		$percent = GETPOST('status');
 	} elseif (GETPOSTISSET('percentage')) {
-		$percent = GETPOST('percentage');
+		$percent = GETPOST('percentage', 'int');
 	} else {
-		if (GETPOST('complete') == '0' || GETPOST("afaire") == 1) {
+		if ($complete == '0' || GETPOST("afaire") == 1) {
 			$percent = '0';
-		} elseif (GETPOST('complete') == 100 || GETPOST("afaire") == 2) {
+		} elseif ($complete == 100 || GETPOST("afaire") == 2) {
 			$percent = 100;
 		}
 	}
@@ -1348,7 +1352,7 @@ if ($id > 0) {
 	$result5 = $object->fetch_optionals();
 
 	if ($listUserAssignedUpdated || $donotclearsession) {
-		$percentage = in_array(GETPOST('status'), array(-1, 100)) ?GETPOST('status') : (in_array(GETPOST('complete'), array(-1, 100)) ?GETPOST('complete') : GETPOST("percentage")); // If status is -1 or 100, percentage is not defined and we must use status
+		$percentage = in_array(GETPOST('status'), array(-1, 100)) ? GETPOST('status') : (in_array($complete, array(-1, 100)) ? $complete : GETPOST("percentage", 'int')); // If status is -1 or 100, percentage is not defined and we must use status
 
 		$datep = dol_mktime($fulldayevent ? '00' : $aphour, $fulldayevent ? '00' : $apmin, 0, GETPOST("apmonth", 'int'), GETPOST("apday", 'int'), GETPOST("apyear", 'int'), 'tzuser');
 		$datef = dol_mktime($fulldayevent ? '23' : $p2hour, $fulldayevent ? '59' : $p2min, $fulldayevent ? '59' : '0', GETPOST("p2month", 'int'), GETPOST("p2day", 'int'), GETPOST("p2year", 'int'), 'tzuser');
@@ -1542,7 +1546,7 @@ if ($id > 0) {
 
 		// Status
 		print '<tr><td class="nowrap">'.$langs->trans("Status").' / '.$langs->trans("Percentage").'</td><td colspan="3">';
-		$percent = GETPOST("percentage") ? GETPOST("percentage") : $object->percentage;
+		$percent = GETPOSTISSET("percentage") ? GETPOST("percentage", "int") : $object->percentage;
 		$formactions->form_select_status_action('formaction', $percent, 1, 'complete', 0, 0, 'maxwidth200');
 		print '</td></tr>';