diff --git a/src/Controller/WarrantyController.php b/src/Controller/WarrantyController.php
index 1d23bc9b..4da828c6 100644
--- a/src/Controller/WarrantyController.php
+++ b/src/Controller/WarrantyController.php
@@ -531,6 +531,7 @@ class WarrantyController extends Controller
                     foreach($warr_results as $warr)
                     {
                         // check if details are complete
+                        //error_log('Updating warranty with serial number ' . $serial . ' and plate number ' . $plate_number);
                         if (empty($warr->getFirstName()))
                         {
                             if (!empty($first_name))
@@ -604,7 +605,16 @@ class WarrantyController extends Controller
                 }
                 else
                 {
-                    // what if serial exists but plate number is different? 
+                    // TODO: what if serial exists but plate number is different? 
+                    // check if just the serial exists
+                    // if warranty exists, ignore for now
+                    $w_results = $em->getRepository(Warranty::class)->findBy(['serial' => $serial]);
+                    if (!empty($w_results))
+                    {
+                        continue;
+                    }
+
+                    //error_log('Adding warranty with serial number ' . $serial . ' and plate number ' . $plate_number);
                     // new warranty
                     $warranty = new Warranty();