diff --git a/declarationtva_view.php b/declarationtva_view.php
index 72b4463..2c326d4 100644
--- a/declarationtva_view.php
+++ b/declarationtva_view.php
@@ -100,36 +100,46 @@ if ($action == 'export_pdf_detailed') {
 
 if ($action == 'validate' && $token) {
     // Validate the declaration
-    setEventMessages("Starting validation process...", null, 'mesgs');
+    $debug_messages = array();
+    $debug_messages[] = "Starting validation process...";
     
     if ($declarationtva->validateDeclaration($id)) {
-        setEventMessages($langs->trans("DeclarationValidated"), null, 'mesgs');
+        $debug_messages[] = "✓ Declaration validated successfully";
         
         // Generate and save detailed PDF to Dolibarr documents
-        setEventMessages("Loading PDF generator...", null, 'mesgs');
+        $debug_messages[] = "Loading PDF generator...";
         require_once DOL_DOCUMENT_ROOT . '/custom/declarationtva/core/class/declarationtva_pdf.class.php';
         $pdf_generator = new DeclarationTVA_PDF($db);
         
-        setEventMessages("Generating detailed PDF...", null, 'mesgs');
+        $debug_messages[] = "Generating detailed PDF...";
         $pdf_path = $pdf_generator->generateDetailedCA3PDF($id);
         
         if ($pdf_path && file_exists($pdf_path)) {
-            setEventMessages("PDF generated successfully: " . $pdf_path, null, 'mesgs');
+            $debug_messages[] = "✓ PDF generated successfully: " . $pdf_path;
             
             // Save PDF to Dolibarr documents
-            setEventMessages("Saving PDF to documents...", null, 'mesgs');
+            $debug_messages[] = "Saving PDF to documents...";
             $save_result = $declarationtva->saveValidatedPDF($id, $pdf_path);
             if (!$save_result) {
+                $debug_messages[] = "✗ PDF save failed: " . $declarationtva->error;
                 setEventMessages("Warning: Declaration validated but PDF save failed: " . $declarationtva->error, null, 'warnings');
             } else {
+                $debug_messages[] = "✓ PDF generated and saved successfully: " . $pdf_path;
                 setEventMessages("PDF generated and saved successfully: " . $pdf_path, null, 'mesgs');
             }
         } else {
+            $debug_messages[] = "✗ PDF generation failed: " . $pdf_generator->error;
+            $debug_messages[] = "PDF path returned: " . ($pdf_path ? $pdf_path : 'NULL');
+            $debug_messages[] = "File exists: " . ($pdf_path && file_exists($pdf_path) ? 'YES' : 'NO');
             setEventMessages("Warning: Declaration validated but PDF generation failed: " . $pdf_generator->error, null, 'warnings');
-            setEventMessages("PDF path returned: " . ($pdf_path ? $pdf_path : 'NULL'), null, 'warnings');
-            setEventMessages("File exists: " . ($pdf_path && file_exists($pdf_path) ? 'YES' : 'NO'), null, 'warnings');
         }
+        
+        // Show all debug messages in a single message
+        $full_debug = implode('<br>', $debug_messages);
+        setEventMessages("Validation Debug Info:<br>" . $full_debug, null, 'mesgs');
+        
     } else {
+        $debug_messages[] = "✗ Declaration validation failed: " . $declarationtva->error;
         setEventMessages($langs->trans("ErrorValidatingDeclaration") . ": " . $declarationtva->error, null, 'errors');
     }
 }