diff --git a/htdocs/don/card.php b/htdocs/don/card.php
index 8571c73f09458..8db831b035ccf 100644
--- a/htdocs/don/card.php
+++ b/htdocs/don/card.php
@@ -333,6 +333,15 @@
 		$object->setProject($projectid);
 	}
 
+	if ($action == 'set_validate' && $permissiontoadd) {
+		$object->fetch($id);
+		if ($object->reopen($user) >= 0) {
+			$action = '';
+		} else {
+			setEventMessages($object->error, $object->errors, 'errors');
+		}
+	}
+
 	if ($action == 'update_extras' && $permissiontoadd) {
 		$object->oldcopy = dol_clone($object, 2);
 
@@ -916,6 +925,9 @@
 		if ($object->status == $object::STATUS_VALIDATED && round($remaintopay) == 0 && $object->paid == 0 && $user->hasRight('don', 'creer')) {
 			print '<div class="inline-block divButAction"><a class="butAction" href="'.$_SERVER["PHP_SELF"].'?rowid='.$object->id.'&action=set_paid&token='.newToken().'">'.$langs->trans("ClassifyPaid")."</a></div>";
 		}
+		if ($object->status == $object::STATUS_PAID && $object->paid == 1 && $user->hasRight('don', 'creer')) {
+			print '<div class="inline-block divButAction"><a class="butAction" href="'.$_SERVER["PHP_SELF"].'?rowid='.$object->id.'&action=set_validate&token='.newToken().'">'.$langs->trans("ReOpen")."</a></div>";
+		}
 
 		// Delete
 		if ($user->hasRight('don', 'supprimer')) {
diff --git a/htdocs/don/class/don.class.php b/htdocs/don/class/don.class.php
index c1f3065035e34..4ed4daa902211 100644
--- a/htdocs/don/class/don.class.php
+++ b/htdocs/don/class/don.class.php
@@ -859,9 +859,22 @@ public function set_cancel($id)
 	public function reopen($user, $notrigger = 0)
 	{
 		// Protection
-		if ($this->status != self::STATUS_CANCELED) {
+		if ($this->status != self::STATUS_CANCELED && $this->status != self::STATUS_PAID) {
 			return 0;
 		}
+		if ($this->statut == self::STATUS_PAID) {
+			$sql = "UPDATE " . MAIN_DB_PREFIX . "don SET paid = 0 WHERE rowid = " . ((int) $this->id);
+
+			$resql = $this->db->query($sql);
+			if ($resql) {
+				if ($this->db->affected_rows($resql)) {
+					$this->paid = 0;
+				} else {
+					dol_print_error($this->db);
+					return -1;
+				}
+			}
+		}
 
 		return $this->setStatusCommon($user, self::STATUS_VALIDATED, $notrigger, 'DON_REOPEN');
 	}