diff --git a/htdocs/public/payment/paymentok.php b/htdocs/public/payment/paymentok.php
index be8da71b4dc..520a4053000 100644
--- a/htdocs/public/payment/paymentok.php
+++ b/htdocs/public/payment/paymentok.php
@@ -395,7 +395,7 @@ if ($ispaymentok) {
 
 			// Do action only if $FinalPaymentAmt is set (session variable is cleaned after this page to avoid duplicate actions when page is POST a second time)
 			if (!empty($FinalPaymentAmt) && $paymentTypeId > 0) {
-				$result = $object->validate($user);
+				$result = ($object->status == $object::STATUS_EXCLUDED) ? -1 : $object->validate($user); // if membre is excluded (status == -2) the new validation is not possible
 				if ($result < 0 || empty($object->datevalid)) {
 					$error++;
 					$errmsg = $object->error;
@@ -413,7 +413,13 @@ if ($ispaymentok) {
 
 				$datesubend = null;
 				if ($datesubscription && $defaultdelay && $defaultdelayunit) {
-					$datesubend = dol_time_plus_duree(dol_time_plus_duree($datesubscription, $defaultdelay, $defaultdelayunit), -1, 'd');
+					$datesubend = dol_time_plus_duree($datesubscription, $defaultdelay, $defaultdelayunit);
+					// the new end date of subscription must be in futur
+					while ($datesubend < $now) {
+						$datesubend = dol_time_plus_duree($datesubend, $defaultdelay, $defaultdelayunit);
+						$datesubscription = dol_time_plus_duree($datesubscription, $defaultdelay, $defaultdelayunit);
+					}
+					$datesubend = dol_time_plus_duree($datesubend, -1, 'd');
 				}
 
 				$paymentdate = $now;