diff --git a/src/Models/Customer.php b/src/Models/Customer.php
index 077ba5f..6d76a08 100644
--- a/src/Models/Customer.php
+++ b/src/Models/Customer.php
@@ -22,7 +22,7 @@ public function contacts()
     {
         return $this->request->handleWithExceptions(function () {
 
-            $builder = new CustomerContactBuilder($this->request, $this->{$this->primaryKey});
+            $builder = new CustomerContactBuilder($this->request, $this->{$this->url_friendly_id});
 
             return $builder->get();
         });
diff --git a/src/Models/CustomerInvoice.php b/src/Models/CustomerInvoice.php
index f37817c..f79e2b4 100644
--- a/src/Models/CustomerInvoice.php
+++ b/src/Models/CustomerInvoice.php
@@ -57,7 +57,7 @@ public function book($send_email = false)
                 ];
             }
 
-            return $this->request->client->post("{$this->entity}/{$this->{$this->primaryKey}}/book" . $query, [
+            return $this->request->client->post("{$this->entity}/{$this->{$this->url_friendly_id}}/book" . $query, [
                 'json' => $body,
             ])
                 ->getBody()
diff --git a/src/Models/DraftOrder.php b/src/Models/DraftOrder.php
index 41111bd..19e6ca0 100644
--- a/src/Models/DraftOrder.php
+++ b/src/Models/DraftOrder.php
@@ -19,8 +19,8 @@ class DraftOrder extends Model
     public function getPDF()
     {
         return $this->request->handleWithExceptions( function () {
-            return $this->request->client->get( "{$this->entity}/{$this->{$this->primaryKey}}.pdf" )->getBody()
-                                         ->getContents();
+            return $this->request->client->get("{$this->entity}/{$this->{$this->url_friendly_id}}.pdf")->getBody()
+                ->getContents();
         } );
     }
 }
diff --git a/src/Models/DraftPurchaseOrder.php b/src/Models/DraftPurchaseOrder.php
index f622ea3..f0da2cb 100644
--- a/src/Models/DraftPurchaseOrder.php
+++ b/src/Models/DraftPurchaseOrder.php
@@ -13,8 +13,8 @@ class DraftPurchaseOrder extends Model
     public function getPDF()
     {
         return $this->request->handleWithExceptions( function () {
-            return $this->request->client->get( "{$this->entity}/{$this->{$this->primaryKey}}.pdf" )->getBody()
-                                         ->getContents();
+            return $this->request->client->get("{$this->entity}/{$this->{$this->url_friendly_id}}.pdf")->getBody()
+                ->getContents();
         } );
     }
 }
diff --git a/src/Models/Lot.php b/src/Models/Lot.php
index b00d1cd..e5f6e10 100644
--- a/src/Models/Lot.php
+++ b/src/Models/Lot.php
@@ -21,7 +21,7 @@ public function variations( $variation_id = 1001 )
     {
         return $this->request->handleWithExceptions( function () use ( $variation_id ) {
 
-            $response = $this->request->client->get( "variations/{$this->{$this->primaryKey}}/variation-matrix" );
+            $response = $this->request->client->get("variations/{$this->{$this->url_friendly_id}}/variation-matrix");
 
             $html = (string) $response->getBody();
 
@@ -33,7 +33,7 @@ public function location()
     {
         return $this->request->handleWithExceptions( function () {
 
-            $response = $this->request->client->get( "{$this->entity}/{$this->{$this->primaryKey}}/locations" );
+            $response = $this->request->client->get("{$this->entity}/{$this->{$this->url_friendly_id}}/locations");
 
             return collect( json_decode( (string) $response->getBody() )->lot_locations );
 
diff --git a/src/Models/Order.php b/src/Models/Order.php
index 70ff012..7ea4510 100644
--- a/src/Models/Order.php
+++ b/src/Models/Order.php
@@ -22,7 +22,7 @@ class Order extends Model
     public function getPDF()
     {
         return $this->request->handleWithExceptions( function () {
-            return $this->request->client->get( "{$this->entity}/{$this->{$this->primaryKey}}.pdf" )->getBody()
+            return $this->request->client->get("{$this->entity}/{$this->{$this->url_friendly_id}}.pdf")->getBody()
                 ->getContents();
         } );
     }
@@ -32,7 +32,7 @@ public function reopen()
 
         return $this->request->handleWithExceptions( function () {
 
-            return $this->request->client->post( "{$this->entity}/{$this->{$this->primaryKey}}/reopen" )
+            return $this->request->client->post("{$this->entity}/{$this->{$this->url_friendly_id}}/reopen")
                 ->getBody()
                 ->getContents();
         } );
@@ -42,7 +42,7 @@ public function createShipment()
     {
         return $this->request->handleWithExceptions(function () {
 
-            $response = json_decode((string)$this->request->client->post("{$this->entity}/{$this->{$this->primaryKey}}/create-shipment")
+            $response = json_decode((string)$this->request->client->post("{$this->entity}/{$this->{$this->url_friendly_id}}/create-shipment")
                 ->getBody());
 
             return new OrderShipment($this->request, $response->order_shipment);
@@ -56,7 +56,7 @@ public function shipments()
             $builder = new OrderShipmentBuilder($this->request);
 
             return $builder->get([
-                ['order_number', '=', $this->{$this->primaryKey}],
+                ['order_number', '=', $this->{$this->url_friendly_id}],
             ]);
         });
     }
@@ -71,7 +71,7 @@ public function convertToInvoice($book = false)
     {
         return $this->request->handleWithExceptions(function () use ($book) {
 
-            $response = json_decode((string)$this->request->client->post("{$this->entity}/{$this->{$this->primaryKey}}/convert-to-invoice?book=" . (($book === true) ? 'true' : 'false'))
+            $response = json_decode((string)$this->request->client->post("{$this->entity}/{$this->{$this->url_friendly_id}}/convert-to-invoice?book=" . (($book === true) ? 'true' : 'false'))
                 ->getBody());
 
             $invoice = (new CustomerInvoiceBuilder($this->request))->find($response->invoice_id);
@@ -85,7 +85,7 @@ public function notes()
         return $this->request->handleWithExceptions(function () {
 
             $builder = new OrderNoteBuilder($this->request);
-            $builder->setEntity(str_replace(':number', $this->{$this->primaryKey}, $builder->getEntity()));
+            $builder->setEntity(str_replace(':number', $this->{$this->url_friendly_id}, $builder->getEntity()));
 
             return $builder->get();
         });
diff --git a/src/Models/OrderShipment.php b/src/Models/OrderShipment.php
index 8631e1b..e15c5ca 100644
--- a/src/Models/OrderShipment.php
+++ b/src/Models/OrderShipment.php
@@ -20,12 +20,12 @@ public function markShipped()
     {
         return $this->request->handleWithExceptions(function () {
 
-            return $this->request->client->post("orders/shipments/{$this->{$this->primaryKey}}/mark-shipped", [
+            return $this->request->client->post("orders/shipments/{$this->{$this->url_friendly_id}}/mark-shipped", [
 
                 'json' => [
 
                     'pick' => true,
-                ]
+                ],
             ])
                 ->getBody()
                 ->getContents();
diff --git a/src/Models/Product.php b/src/Models/Product.php
index 08ef497..0637af2 100644
--- a/src/Models/Product.php
+++ b/src/Models/Product.php
@@ -44,8 +44,8 @@ public function inventoryMatrix( $location_id = null, array $filter = null )
                 }
             }
 
-            $response = $this->request->client->get( "{$this->entity}/{$this->{$this->primaryKey}}/variation-matrix" .
-                                                     $query );
+            $response = $this->request->client->get("{$this->entity}/{$this->{$this->url_friendly_id}}/variation-matrix" .
+                $query);
 
             $html = (string) $response->getBody();
 
@@ -58,7 +58,7 @@ public function variations( $variation_id = 1001 )
     {
         return $this->request->handleWithExceptions( function () use ( $variation_id ) {
 
-            $response = $this->request->client->get( "variations/{$this->{$this->primaryKey}}/variation-matrix" );
+            $response = $this->request->client->get("variations/{$this->{$this->url_friendly_id}}/variation-matrix");
 
             $html = (string) $response->getBody();
 
@@ -70,7 +70,7 @@ public function location($number = null)
     {
         return $this->request->handleWithExceptions(function () use ($number) {
 
-            $response = json_decode((string)$this->request->client->get("{$this->entity}/{$this->{$this->primaryKey}}/locations" . (($number !== null) ? '/' . $number : ''))->getBody());
+            $response = json_decode((string)$this->request->client->get("{$this->entity}/{$this->{$this->url_friendly_id}}/locations" . (($number !== null) ? '/' . $number : ''))->getBody());
 
             if (isset($response->product_locations)) {
 
@@ -109,7 +109,7 @@ public function fields()
         return $this->request->handleWithExceptions( function () {
 
             $response =
-                $this->request->client->get( "{$this->entity}/{$this->{$this->primaryKey}}/fields" );
+                $this->request->client->get("{$this->entity}/{$this->{$this->url_friendly_id}}/fields");
 
             return collect( json_decode( (string) $response->getBody() )->field_values );
 
diff --git a/src/Models/ProductionOrder.php b/src/Models/ProductionOrder.php
index c714759..a71e9c9 100644
--- a/src/Models/ProductionOrder.php
+++ b/src/Models/ProductionOrder.php
@@ -19,8 +19,8 @@ class ProductionOrder extends Model
     public function getPDF()
     {
         return $this->request->handleWithExceptions( function () {
-            return $this->request->client->get( "{$this->entity}/{$this->{$this->primaryKey}}.pdf" )->getBody()
-                                         ->getContents();
+            return $this->request->client->get("{$this->entity}/{$this->{$this->url_friendly_id}}.pdf")->getBody()
+                ->getContents();
         } );
     }
 }
diff --git a/src/Models/PurchaseOrder.php b/src/Models/PurchaseOrder.php
index 371ee6d..6edfb67 100644
--- a/src/Models/PurchaseOrder.php
+++ b/src/Models/PurchaseOrder.php
@@ -13,8 +13,8 @@ class PurchaseOrder extends Model
     public function getPDF()
     {
         return $this->request->handleWithExceptions( function () {
-            return $this->request->client->get( "{$this->entity}/{$this->{$this->primaryKey}}.pdf" )->getBody()
-                                         ->getContents();
+            return $this->request->client->get("{$this->entity}/{$this->{$this->url_friendly_id}}.pdf")->getBody()
+                ->getContents();
         } );
     }
 
@@ -23,9 +23,9 @@ public function reopen()
 
         return $this->request->handleWithExceptions( function () {
 
-            return $this->request->client->post( "{$this->entity}/{$this->{$this->primaryKey}}/reopen" )
-                                         ->getBody()
-                                         ->getContents();
+            return $this->request->client->post("{$this->entity}/{$this->{$this->url_friendly_id}}/reopen")
+                ->getBody()
+                ->getContents();
         } );
     }
 }
diff --git a/src/Models/Variation/Type.php b/src/Models/Variation/Type.php
index bafb996..2af0db1 100644
--- a/src/Models/Variation/Type.php
+++ b/src/Models/Variation/Type.php
@@ -31,8 +31,8 @@ public function options()
     {
         $options    = new TypeOptionBuilder( $this->request );
         $old_entity = $options->getEntity();
-        $new_entity = $options->setEntity( str_replace( ':variation_number', $this->variation_id, $old_entity ) );
-        $options->setEntity( str_replace( ':type_number', $this->{$this->primaryKey}, $new_entity ) );
+        $new_entity = $options->setEntity(str_replace(':variation_number', $this->variation_id, $old_entity));
+        $options->setEntity(str_replace(':type_number', $this->{$this->url_friendly_id}, $new_entity));
 
         return $options;
     }
diff --git a/src/Utils/Model.php b/src/Utils/Model.php
index 94083a4..0340019 100644
--- a/src/Utils/Model.php
+++ b/src/Utils/Model.php
@@ -13,6 +13,7 @@ class Model
 {
     protected $entity;
     protected $primaryKey;
+    protected $url_friendly_id;
     protected $modelClass = self::class;
     protected $fillable   = [];
 
@@ -45,7 +46,7 @@ protected function setAttribute( $attribute, $value )
     {
         if ($attribute === $this->primaryKey) {
 
-            $value = rawurlencode(rawurlencode($value));
+            $this->url_friendly_id = rawurldecode(rawurldecode($value));
         }
 
         $this->{$attribute} = $value;
@@ -76,7 +77,7 @@ public function delete()
     {
         return $this->request->handleWithExceptions( function () {
 
-            return $this->request->client->delete( "{$this->entity}/{$this->{$this->primaryKey}}" );
+            return $this->request->client->delete("{$this->entity}/{$this->{$this->url_friendly_id}}");
         } );
     }
 
@@ -85,9 +86,9 @@ public function update( $data = [] )
 
         return $this->request->handleWithExceptions( function () use ( $data ) {
 
-            $response = $this->request->client->put( "{$this->entity}/{$this->{$this->primaryKey}}", [
+            $response = $this->request->client->put("{$this->entity}/{$this->{$this->url_friendly_id}}", [
                 'json' => $data,
-            ] );
+            ]);
 
             $responseData = collect( json_decode( (string) $response->getBody() ) );