diff --git a/src/Transaction.php b/src/Transaction.php
index fa9c88b..9b52861 100644
--- a/src/Transaction.php
+++ b/src/Transaction.php
@@ -256,6 +256,7 @@ public function valid()
 
                     break;
                 case 'res_delete':
+                case 'res_lookup_full':
                 case 'res_lookup_masked':
                     $errors[] = Validator::set($params, 'data_key') ? null : 'Data key not provided.';
 
diff --git a/src/Vault.php b/src/Vault.php
index 3aa45af..d7ac3b5 100644
--- a/src/Vault.php
+++ b/src/Vault.php
@@ -87,13 +87,14 @@ public static function create(string $id, string $token, string $environment)
      * profile associated with a given data key.
      *
      * @param string $key
+     * @param bool $full
      *
      * @return \CraigPaul\Moneris\Response
      */
-    public function peek(string $key)
+    public function peek(string $key, bool $full = false)
     {
         $params = [
-            'type' => 'res_lookup_masked',
+            'type' => $full ? 'res_lookup_full' : 'res_lookup_masked',
             'data_key' => $key,
         ];