diff --git a/src/Fedex/Rate.php b/src/Fedex/Rate.php
index bc4ba01..82f8dad 100644
--- a/src/Fedex/Rate.php
+++ b/src/Fedex/Rate.php
@@ -7,6 +7,7 @@ use pdt256\Shipping\Arr;
 use pdt256\Shipping\Quote;
 use pdt256\Shipping\RateAdapter;
 use pdt256\Shipping\RateRequest;
+use pdt256\Shipping\Validator;
 use DOMDocument;
 use Exception;
 
@@ -15,19 +16,18 @@ class Rate extends RateAdapter
     private $urlDev = 'https://gatewaybeta.fedex.com/web-services/';
     private $urlProd = 'https://gateway.fedex.com/web-services/';
 
-    private $key = 'XXX';
-    private $password = 'XXX';
-    private $accountNumber = 'XXX';
-    private $meterNumber = 'XXX';
-    private $dropOffType = 'BUSINESS_SERVICE_CENTER';
-
-    public $approvedCodes = [
-        'PRIORITY_OVERNIGHT',
-        'FEDEX_2_DAY',
-        'FEDEX_EXPRESS_SAVER',
-        'FEDEX_GROUND',
-        'GROUND_HOME_DELIVERY',
-    ];
+    private $key;
+    private $password;
+    private $accountNumber;
+    private $meterNumber;
+    /**
+     * Type of Drop off, default value "BUSINESS_SERVICE_CENTER" is defined in __construct if not specified.
+     */
+    private $dropOffType;
+    /**
+     * Codes of appropriate shipping types. Default value is specified in __construct.
+     */
+    public $approvedCodes;
 
     private $shippingCodes = [
         'EUROPE_FIRST_INTERNATIONAL_PRIORITY' => 'Europe First International Priority',
@@ -61,12 +61,37 @@ class Rate extends RateAdapter
         $this->password      = Arr::get($options, 'password');
         $this->accountNumber = Arr::get($options, 'accountNumber');
         $this->meterNumber   = Arr::get($options, 'meterNumber');
-        $this->approvedCodes = Arr::get($options, 'approvedCodes');
-        $this->dropOffType   = Arr::get($options, 'dropOffType');
+        $this->approvedCodes = Arr::get($options, 'approvedCodes', [
+            'PRIORITY_OVERNIGHT',
+            'FEDEX_2_DAY',
+            'FEDEX_EXPRESS_SAVER',
+            'FEDEX_GROUND',
+            'GROUND_HOME_DELIVERY',
+        ]);
+        $this->dropOffType   = Arr::get($options, 'dropOffType', 'BUSINESS_SERVICE_CENTER');
 
         $this->setRequestAdapter(Arr::get($options, 'requestAdapter', new RateRequest\Post()));
     }
+    protected function validate()
+    {
+        foreach ($this->shipment->getPackages() as $package) {
+            Validator::checkIfNull($package->getWeight(), 'weight');
+            Validator::checkIfNull($package->getLength(), 'length');
+            Validator::checkIfNull($package->getHeight(), 'height');
+        }
+        Validator::checkIfNull($this->key, 'key');
+        Validator::checkIfNull($this->password, 'password');
+        Validator::checkIfNull($this->accountNumber, 'accountNumber');
+        Validator::checkIfNull($this->meterNumber, 'meterNumber');
+        Validator::checkIfNull($this->shipment->getFromPostalCode(), 'fromPostalCode');
+        Validator::checkIfNull($this->shipment->getFromCountryCode(), 'fromCountryCode');
+        Validator::checkIfNull($this->shipment->getFromIsResidential(), 'fromIsResidential');
+        Validator::checkIfNull($this->shipment->getToPostalCode(), 'toPostalCode');
+        Validator::checkIfNull($this->shipment->getToCountryCode(), 'toCountryCode');
+        Validator::checkIfNull($this->shipment->getToIsResidential(), 'toIsResidential');
 
+        return $this;
+    }
     protected function prepare()
     {
         $date = time();
@@ -103,7 +128,6 @@ class Rate extends RateAdapter
                     '</Dimensions>' .
                 '</RequestedPackageLineItems>';
         }
-
         $this->data = '<?xml version="1.0"?>' .
             '<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" ' .
                 'xmlns="http://fedex.com/ws/rate/v13">' .
diff --git a/src/RateAdapter.php b/src/RateAdapter.php
index 0a334cd..b4b5995 100644
--- a/src/RateAdapter.php
+++ b/src/RateAdapter.php
@@ -16,6 +16,10 @@ abstract class RateAdapter
     /** @var  @var RateRequest\Adapter */
     protected $rateRequest;
 
+    /**
+     * Make sure all necessary fields are set
+     */
+    abstract protected function validate();
     /**
      * Prepare XML
      */
@@ -47,6 +51,7 @@ abstract class RateAdapter
     public function getRates()
     {
         $this
+            ->validate()
             ->prepare()
             ->execute()
             ->process()
diff --git a/src/Ship.php b/src/Ship.php
index dde40f8..0ce4c50 100644
--- a/src/Ship.php
+++ b/src/Ship.php
@@ -58,7 +58,6 @@ class Ship
 
         // Build approvedCodes
         foreach ($this->shipping_options as $shipping_group => $row) {
-
             foreach ($row as $_carrier => $row2) {
                 if (!isset($approvedCodes[$_carrier])) {
                     $approvedCodes[$_carrier] = [];
@@ -89,9 +88,7 @@ class Ship
                 $group_codes = array_keys($row2);
 
                 if (! empty($rates[$carrier])) {
-
                     foreach ($rates[$carrier] as $row3) {
-
                         if (in_array($row3->getCode(), $group_codes)) {
                             $row3->setCarrier($carrier);
 
@@ -127,9 +124,7 @@ class Ship
                 $group_codes = array_keys($row2);
 
                 if (!empty($rates[$carrier])) {
-
                     foreach ($rates[$carrier] as $row3) {
-
                         if (in_array($row3->getCode(), $group_codes)) {
                             $row3->setCarrier($carrier);
                             $display_rates[$shipping_group][] = $row3;
diff --git a/src/UPS/Rate.php b/src/UPS/Rate.php
index 0e98561..c8ecf67 100644
--- a/src/UPS/Rate.php
+++ b/src/UPS/Rate.php
@@ -1,11 +1,11 @@
 <?php
 namespace pdt256\Shipping\UPS;
 
-use pdt256\Ship;
 use pdt256\Shipping\Arr;
 use pdt256\Shipping\Quote;
 use pdt256\Shipping\RateAdapter;
 use pdt256\Shipping\RateRequest;
+use pdt256\Shipping\Validator;
 use DOMDocument;
 use Exception;
 
@@ -14,15 +14,14 @@ class Rate extends RateAdapter
     private $urlDev = 'https://wwwcie.ups.com/ups.app/xml/Rate';
     private $urlProd = 'https://www.ups.com/ups.app/xml/Rate';
 
-    private $accessKey = 'XXX';
-    private $userId = 'XXX';
-    private $password = 'XXX';
-    private $shipperNumber = 'XXX';
-
-    public $approvedCodes = [
-        '03',
-        '12',
-    ];
+    private $accessKey;
+    private $userId;
+    private $password;
+    private $shipperNumber;
+    /**
+     * Codes of appropriate shipping types. Default value is specified in __construct.
+     */
+    public $approvedCodes;
 
     private $shippingCodes = [
         'US' => [ // United States
@@ -90,12 +89,34 @@ class Rate extends RateAdapter
         $this->userId        = Arr::get($options, 'userId');
         $this->password      = Arr::get($options, 'password');
         $this->shipperNumber = Arr::get($options, 'shipperNumber');
-        $this->approvedCodes = Arr::get($options, 'approvedCodes');
+        $this->approvedCodes = Arr::get($options, 'approvedCodes', [
+            '03',
+            '12',
+        ]);
 
         $this->setRequestAdapter(Arr::get($options, 'requestAdapter', new RateRequest\Post()));
 
     }
+    protected function validate()
+    {
+        foreach ($this->shipment->getPackages() as $package) {
+            Validator::checkIfNull($package->getWeight(), 'weight');
+            Validator::checkIfNull($package->getLength(), 'length');
+            Validator::checkIfNull($package->getHeight(), 'height');
+        }
+        Validator::checkIfNull($this->accessKey, 'accessKey');
+        Validator::checkIfNull($this->userId, 'userId');
+        Validator::checkIfNull($this->password, 'password');
+        Validator::checkIfNull($this->shipperNumber, 'shipperNumber');
+        Validator::checkIfNull($this->shipment->getFromPostalCode(), 'fromPostalCode');
+        Validator::checkIfNull($this->shipment->getFromCountryCode(), 'fromCountryCode');
+        Validator::checkIfNull($this->shipment->getFromIsResidential(), 'fromIsResidential');
+        Validator::checkIfNull($this->shipment->getToPostalCode(), 'toPostalCode');
+        Validator::checkIfNull($this->shipment->getToCountryCode(), 'toCountryCode');
+        Validator::checkIfNull($this->shipment->getToIsResidential(), 'toIsResidential');
 
+        return $this;
+    }
     protected function prepare()
     {
         $service_code = '03';
diff --git a/src/USPS/Rate.php b/src/USPS/Rate.php
index f5e4887..2ade0ec 100644
--- a/src/USPS/Rate.php
+++ b/src/USPS/Rate.php
@@ -6,6 +6,7 @@ use pdt256\Shipping\Arr;
 use pdt256\Shipping\Quote;
 use pdt256\Shipping\RateAdapter;
 use pdt256\Shipping\RateRequest;
+use pdt256\Shipping\Validator;
 use DOMDocument;
 use Exception;
 
@@ -14,13 +15,12 @@ class Rate extends RateAdapter
     private $urlDev = 'http://production.shippingapis.com/ShippingAPI.dll';
     private $urlProd = 'http://production.shippingapis.com/ShippingAPI.dll';
 
-    private $username = 'XXX';
-    private $password = 'XXX';
-
-    public $approvedCodes = [
-        '1',
-        '4',
-    ];
+    private $username;
+    private $password;
+    /**
+     * Codes of appropriate shipping types. Default value is specified in __construct.
+     */
+    public $approvedCodes;
 
     private $shipping_codes = [
         'domestic' => [
@@ -73,10 +73,26 @@ class Rate extends RateAdapter
 
         $this->username = Arr::get($options, 'username');
         $this->password = Arr::get($options, 'password');
-        $this->approvedCodes = Arr::get($options, 'approvedCodes');
+        $this->approvedCodes = Arr::get($options, 'approvedCodes', [
+            '1',
+            '4',
+        ]);
         $this->setRequestAdapter(Arr::get($options, 'requestAdapter', new RateRequest\Get()));
     }
+    protected function validate()
+    {
+        foreach ($this->shipment->getPackages() as $package) {
+            Validator::checkIfNull($package->getWeight(), 'weight');
+            Validator::checkIfNull($package->getLength(), 'length');
+            Validator::checkIfNull($package->getHeight(), 'height');
+        }
+        Validator::checkIfNull($this->username, 'username');
+        Validator::checkIfNull($this->password, 'password');
+        Validator::checkIfNull($this->shipment->getFromPostalCode(), 'fromPostalCode');
+        Validator::checkIfNull($this->shipment->getToPostalCode(), 'toPostalCode');
 
+        return $this;
+    }
     protected function prepare()
     {
         $packages = '';
diff --git a/src/Validator.php b/src/Validator.php
new file mode 100644
index 0000000..70d7acb
--- /dev/null
+++ b/src/Validator.php
@@ -0,0 +1,12 @@
+<?php
+namespace pdt256\Shipping;
+
+class Validator
+{
+    public static function checkIfNull($value, $name)
+    {
+        if ($value === null) {
+            throw new \LogicException("$name is not set");
+        }
+    }
+}
diff --git a/tests/Fedex/FedexTest.php b/tests/Fedex/FedexTest.php
index 01012ba..e68b82f 100644
--- a/tests/Fedex/FedexTest.php
+++ b/tests/Fedex/FedexTest.php
@@ -49,6 +49,7 @@ class RateTest extends \PHPUnit_Framework_TestCase
         $this->shipment->setFromStateProvinceCode('CA')
             ->setFromPostalCode('90401')
             ->setFromCountryCode('US')
+            ->setFromIsResidential(true)
             ->setToPostalCode('78703')
             ->setToCountryCode('US')
             ->setToIsResidential(true)
@@ -59,12 +60,15 @@ class RateTest extends \PHPUnit_Framework_TestCase
     {
         $rateAdapter = new Rate([
             'prod' => false,
-            'drop_off_type' => 'BUSINESS_SERVICE_CENTER',
+            'key' => 'XXX',
+            'password' => 'XXX',
+            'accountNumber' => 'XXX',
+            'meterNumber' => 'XXX',
+            'dropOffType' => 'BUSINESS_SERVICE_CENTER',
             'shipment' => $this->shipment,
             'approvedCodes' => $this->approvedCodes,
             'requestAdapter' => new StubFedex,
         ]);
-
         $rates = $rateAdapter->getRates();
 
         $ground = new Quote('fedex', 'GROUND_HOME_DELIVERY', 'Ground Home Delivery', 1655);
diff --git a/tests/ShipTest.php b/tests/ShipTest.php
index 7b8bc10..94175b3 100644
--- a/tests/ShipTest.php
+++ b/tests/ShipTest.php
@@ -49,6 +49,7 @@ class ShipTest extends \PHPUnit_Framework_TestCase
         $s->setFromStateProvinceCode('CA')
             ->setFromPostalCode('90401')
             ->setFromCountryCode('US')
+            ->setFromIsResidential(true)
             ->setToPostalCode('78703')
             ->setToCountryCode('US')
             ->setToIsResidential(true);
@@ -105,9 +106,9 @@ class ShipTest extends \PHPUnit_Framework_TestCase
             'prod' => false,
             'key' => 'XXXX',
             'password' => 'XXXX',
-            'account_number' => 'XXXX',
-            'meter_number' => 'XXXX',
-            'drop_off_type' => 'BUSINESS_SERVICE_CENTER',
+            'accountNumber' => 'XXXX',
+            'meterNumber' => 'XXXX',
+            'dropOffType' => 'BUSINESS_SERVICE_CENTER',
             'shipment' => $this->shipment,
             'approvedCodes' => $approvedCodes,
             'requestAdapter' => new RateRequest\StubFedex(),
diff --git a/tests/UPS/RateTest.php b/tests/UPS/RateTest.php
index e16e015..4edf4ad 100644
--- a/tests/UPS/RateTest.php
+++ b/tests/UPS/RateTest.php
@@ -48,6 +48,7 @@ class RateTest extends \PHPUnit_Framework_TestCase
         $this->shipment->setFromStateProvinceCode('CA')
             ->setFromPostalCode('90401')
             ->setFromCountryCode('US')
+            ->setFromIsResidential(true)
             ->setToPostalCode('78703')
             ->setToCountryCode('US')
             ->setToIsResidential(true)
@@ -57,6 +58,10 @@ class RateTest extends \PHPUnit_Framework_TestCase
     public function testMockRates()
     {
         $rateAdapter = new Rate([
+            'accessKey' => 'XXX',
+            'userId' => 'XXX',
+            'password' => 'XXX',
+            'shipperNumber' => 'XXX',
             'prod' => false,
             'shipment' => $this->shipment,
             'approvedCodes' => $this->approvedCodes,