diff --git a/Lib/Export/MAILserviciosExport.php b/Lib/Export/MAILserviciosExport.php
index 81a26ac..8dc7240 100644
--- a/Lib/Export/MAILserviciosExport.php
+++ b/Lib/Export/MAILserviciosExport.php
@@ -79,7 +79,7 @@ public function addModelPage($model, $columns, $title = ''): bool
      */
     public function show(Response &$response)
     {
-        $fileName = $this->getFileName() . '_mail_' . time() . '.pdf';
+        $fileName = $this->getFileName() . '_mail_' . time() . '_' . uniqid('', true) . '.pdf';
         $filePath = FS_FOLDER . '/' . NewMail::ATTACHMENTS_TMP_PATH . $fileName;
         if (false === Tools::folderCheckOrCreate(FS_FOLDER . '/' . NewMail::ATTACHMENTS_TMP_PATH) ||
             false === file_put_contents($filePath, $this->getDoc())) {
diff --git a/Lib/Export/PlantillasMAILserviciosExport.php b/Lib/Export/PlantillasMAILserviciosExport.php
index e345e8d..ef5ad4e 100644
--- a/Lib/Export/PlantillasMAILserviciosExport.php
+++ b/Lib/Export/PlantillasMAILserviciosExport.php
@@ -79,7 +79,7 @@ public function addModelPage($model, $columns, $title = ''): bool
      */
     public function show(Response &$response)
     {
-        $fileName = $this->getFileName() . '_mail_' . time() . '.pdf';
+        $fileName = $this->getFileName() . '_mail_' . time() . '_' . uniqid('', true) . '.pdf';
         $filePath = FS_FOLDER . '/' . NewMail::ATTACHMENTS_TMP_PATH . $fileName;
         if (false === Tools::folderCheckOrCreate(FS_FOLDER . '/' . NewMail::ATTACHMENTS_TMP_PATH) ||
             false === file_put_contents($filePath, $this->getDoc())) {