diff --git a/assets/pdfs/misc/4-rects-signed-and-locked.pdf b/assets/pdfs/misc/4-rects-signed-and-locked.pdf
new file mode 100644
index 0000000..1fd7cf8
Binary files /dev/null and b/assets/pdfs/misc/4-rects-signed-and-locked.pdf differ
diff --git a/public/demos/5-Signer/4-various/1-get-existing-signature-fields/script.php b/public/demos/5-Signer/4-various/1-get-existing-signature-fields/script.php
index 26e6dbf..9df40d9 100644
--- a/public/demos/5-Signer/4-various/1-get-existing-signature-fields/script.php
+++ b/public/demos/5-Signer/4-various/1-get-existing-signature-fields/script.php
@@ -7,7 +7,8 @@
     $assetsDirectory . '/pdfs/tektown/Laboratory-Report-signed.pdf',
     $assetsDirectory . '/pdfs/tektown/Laboratory-Report-signed-no-LTV.pdf',
     $assetsDirectory . '/pdfs/tektown/Order-Form.pdf',
-    $assetsDirectory . '/pdfs/lenstown/Laboratory-Report-signed-PAdES.pdf'
+    $assetsDirectory . '/pdfs/lenstown/Laboratory-Report-signed-PAdES.pdf',
+    $assetsDirectory . '/pdfs/misc/4-rects-signed-and-locked.pdf'
 ];
 
 $path = displayFiles($files);
@@ -23,5 +24,22 @@
         echo '<b>NOT</b>';
     }
 
-    echo ' used/signed.<br/><br/>';
+    echo ' used/signed.<br/>';
+    $lock = $field->getLock();
+    if (is_array($lock)) {
+        if ($lock['action'] === SetaPDF_Signer_SignatureField::LOCK_DOCUMENT_ALL) {
+            echo '&nbsp;&nbsp;The document is locked by "' . htmlspecialchars($signatureFieldName) . '"<br/>';
+        } elseif ($lock['action'] === SetaPDF_Signer_SignatureField::LOCK_DOCUMENT_INCLUDE) {
+            echo '&nbsp;&nbsp;Fields are locked by "' . htmlspecialchars($signatureFieldName) . '"<br/>';
+            echo '<pre>';
+            var_dump(array_map(['SetaPDF_Core_Encoding', 'convertPdfString'], $lock['fields']));
+            echo '</pre>';
+        } elseif ($lock['action'] === SetaPDF_Signer_SignatureField::LOCK_DOCUMENT_EXCLUDE) {
+            echo '&nbsp;&nbsp;Fields are not locked by "' . htmlspecialchars($signatureFieldName) . '"<br/>';
+            echo '<pre>';
+            var_dump(array_map(['SetaPDF_Core_Encoding', 'convertPdfString'], $lock['fields']));
+            echo '</pre>';
+        }
+    }
+    echo '<br/>';
 }