diff --git a/usps_api_bridge.php b/usps_api_bridge.php
index e59c323..8d73353 100644
--- a/usps_api_bridge.php
+++ b/usps_api_bridge.php
@@ -234,6 +234,9 @@ class Usps_Api_Bridge extends Module
         }
 
         if (empty($destCountryIso)) {
+            $this->externalLog([
+                'destCountryIso' => 'set to default',
+            ]);
             $destCountryIso = 'US';
         }
 
@@ -249,11 +252,25 @@ class Usps_Api_Bridge extends Module
 
         // Map Code
         $newApiClass = $this->mapServiceCodeToApiClass($methodCode, $isInternational);
-        if (!$newApiClass) return false;
+        if (!$newApiClass) {
+            $this->externalLog([
+                'mapServiceCodeToApiClass()' => 'failed',
+                'methodCode' => $methodCode,
+                'isInternational' => $isInternational,
+            ]);
+            return false;
+        }
 
         // 6. Pack Products
         $packedBoxes = $originalModule->getHelper()->getCarrierHelper()->packProducts($products, $params->id);
-        if (empty($packedBoxes)) return false;
+        if (empty($packedBoxes)) {
+            $this->externalLog([
+                'packProducts()' => 'failed',
+                'products' => $products,
+                'params->id' => $params->id,
+            ]);
+            return false;
+        }
 
         // 7. Setup Client
         $client = new UspsV3Client($token, (bool)\Configuration::get('USPS_BRIDGE_LIVE_MODE'));