diff --git a/core/class/declarationtva.class.php b/core/class/declarationtva.class.php
index 4d5aea5..c4ed6f5 100644
--- a/core/class/declarationtva.class.php
+++ b/core/class/declarationtva.class.php
@@ -1263,8 +1263,8 @@ class DeclarationTVA
         // Debug: Log the search
         error_log("hasValidatedDocument: Searching in " . $vat_declarations_dir . " for declaration " . $obj->declaration_number);
         
-        // Look for PDF files with the declaration number
-        $pattern = $vat_declarations_dir . 'CA3_' . $obj->declaration_number . '_*.pdf';
+        // Look for PDF files with the declaration ID (not declaration number)
+        $pattern = $vat_declarations_dir . 'CA3_' . $declaration_id . '_*.pdf';
         $files = glob($pattern);
         
         // Debug: Log the pattern and results
@@ -1273,7 +1273,7 @@ class DeclarationTVA
         
         // If no files found with the exact pattern, try a more flexible search
         if (empty($files)) {
-            $pattern = $vat_declarations_dir . 'CA3_*' . $obj->declaration_number . '*.pdf';
+            $pattern = $vat_declarations_dir . 'CA3_*' . $declaration_id . '*.pdf';
             $files = glob($pattern);
             error_log("hasValidatedDocument: Flexible pattern: " . $pattern);
             error_log("hasValidatedDocument: Flexible files found: " . print_r($files, true));
@@ -1311,13 +1311,13 @@ class DeclarationTVA
         // Check if PDF file exists in the VAT declarations validated directory
         $vat_declarations_dir = DOL_DATA_ROOT . '/declarationtva/validated/';
         
-        // Look for PDF files with the declaration number
-        $pattern = $vat_declarations_dir . 'CA3_' . $obj->declaration_number . '_*.pdf';
+        // Look for PDF files with the declaration ID (not declaration number)
+        $pattern = $vat_declarations_dir . 'CA3_' . $declaration_id . '_*.pdf';
         $files = glob($pattern);
         
         // If no files found with the exact pattern, try a more flexible search
         if (empty($files)) {
-            $pattern = $vat_declarations_dir . 'CA3_*' . $obj->declaration_number . '*.pdf';
+            $pattern = $vat_declarations_dir . 'CA3_*' . $declaration_id . '*.pdf';
             $files = glob($pattern);
         }