diff --git a/app/Http/Controllers/BaseAPIController.php b/app/Http/Controllers/BaseAPIController.php
index db99a3beaf1d..8e48f3bff878 100644
--- a/app/Http/Controllers/BaseAPIController.php
+++ b/app/Http/Controllers/BaseAPIController.php
@@ -193,26 +193,19 @@ class BaseAPIController extends Controller
 
     protected function getRequestIncludes($data)
     {
-        $data[] = 'user';
-
         $included = Request::get('include');
         $included = explode(',', $included);
 
         foreach ($included as $include) {
             if ($include == 'invoices') {
                 $data[] = 'invoices.invoice_items';
-                $data[] = 'invoices.user';
             } elseif ($include == 'client') {
                 $data[] = 'client.contacts';
-                $data[] = 'client.user';
             } elseif ($include == 'clients') {
                 $data[] = 'clients.contacts';
-                $data[] = 'clients.user';
             } elseif ($include == 'vendors') {
                 $data[] = 'vendors.vendorcontacts';
-                $data[] = 'vendors.user';
-            }
-            elseif ($include) {
+            } elseif ($include) {
                 $data[] = $include;
             }
         }
diff --git a/app/Http/Controllers/PaymentApiController.php b/app/Http/Controllers/PaymentApiController.php
index 0dd8de50803b..3355b6bff8f4 100644
--- a/app/Http/Controllers/PaymentApiController.php
+++ b/app/Http/Controllers/PaymentApiController.php
@@ -49,7 +49,7 @@ class PaymentApiController extends BaseAPIController
     {
         $payments = Payment::scope()
                         ->withTrashed()
-                        ->with(['invoice'])                        
+                        ->with(['invoice'])
                         ->orderBy('created_at', 'desc');
 
         return $this->listResponse($payments);
diff --git a/app/Models/InvoiceItem.php b/app/Models/InvoiceItem.php
index d3981c931c62..e80482bafdb8 100644
--- a/app/Models/InvoiceItem.php
+++ b/app/Models/InvoiceItem.php
@@ -19,6 +19,11 @@ class InvoiceItem extends EntityModel
         return $this->belongsTo('App\Models\Invoice');
     }
 
+    public function user()
+    {
+        return $this->belongsTo('App\Models\User')->withTrashed();
+    }
+
     public function product()
     {
         return $this->belongsTo('App\Models\Product');
diff --git a/app/Models/Product.php b/app/Models/Product.php
index 0d3221f2a1ea..05944c9fff94 100644
--- a/app/Models/Product.php
+++ b/app/Models/Product.php
@@ -26,6 +26,11 @@ class Product extends EntityModel
         return Product::scope()->where('product_key', '=', $key)->first();
     }
 
+    public function user()
+    {
+        return $this->belongsTo('App\Models\User')->withTrashed();
+    }
+
     public function default_tax_rate()
     {
         return $this->belongsTo('App\Models\TaxRate');
diff --git a/app/Models/TaxRate.php b/app/Models/TaxRate.php
index 72ad266b07d8..384ccf933b36 100644
--- a/app/Models/TaxRate.php
+++ b/app/Models/TaxRate.php
@@ -17,4 +17,9 @@ class TaxRate extends EntityModel
     {
         return ENTITY_TAX_RATE;
     }
+
+    public function user()
+    {
+        return $this->belongsTo('App\Models\User')->withTrashed();
+    }
 }
diff --git a/app/Ninja/Transformers/ClientTransformer.php b/app/Ninja/Transformers/ClientTransformer.php
index e9a63e07d693..63f0baa0c871 100644
--- a/app/Ninja/Transformers/ClientTransformer.php
+++ b/app/Ninja/Transformers/ClientTransformer.php
@@ -77,13 +77,11 @@ class ClientTransformer extends EntityTransformer
 
     public function transform(Client $client)
     {
-        return [
+        return array_merge($this->getDefaults($client), [
             'id' => (int) $client->public_id,
             'name' => $client->name,
             'balance' => (float) $client->balance,
             'paid_to_date' => (float) $client->paid_to_date,
-            'user_id' => (int) $client->user->public_id + 1,
-            'account_key' => $this->account->account_key,
             'updated_at' => $this->getTimestamp($client->updated_at),
             'archived_at' => $this->getTimestamp($client->deleted_at),
             'address1' => $client->address1,
@@ -106,6 +104,6 @@ class ClientTransformer extends EntityTransformer
             'currency_id' => (int) $client->currency_id,
             'custom_value1' => $client->custom_value1,
             'custom_value2' => $client->custom_value2,
-        ];
+        ]);
     }
 }
\ No newline at end of file
diff --git a/app/Ninja/Transformers/ContactTransformer.php b/app/Ninja/Transformers/ContactTransformer.php
index e404b73660d4..68172e156c60 100644
--- a/app/Ninja/Transformers/ContactTransformer.php
+++ b/app/Ninja/Transformers/ContactTransformer.php
@@ -8,7 +8,7 @@ class ContactTransformer extends EntityTransformer
 {
     public function transform(Contact $contact)
     {
-        return [
+        return array_merge($this->getDefaults($contact), [
             'id' => (int) $contact->public_id,
             'first_name' => $contact->first_name,
             'last_name' => $contact->last_name,
@@ -18,8 +18,7 @@ class ContactTransformer extends EntityTransformer
             'is_primary' => (bool) $contact->is_primary,
             'phone' => $contact->phone,
             'last_login' => $contact->last_login,
-            'account_key' => $this->account->account_key,
             'send_invoice' => (bool) $contact->send_invoice,
-        ];
+        ]);
     }
 }
\ No newline at end of file
diff --git a/app/Ninja/Transformers/CreditTransformer.php b/app/Ninja/Transformers/CreditTransformer.php
index a33185d2ff39..39ce5ff1d8f3 100644
--- a/app/Ninja/Transformers/CreditTransformer.php
+++ b/app/Ninja/Transformers/CreditTransformer.php
@@ -8,17 +8,16 @@ class CreditTransformer extends EntityTransformer
 {
     public function transform(Credit $credit)
     {
-        return [
+        return array_merge($this->getDefaults($credit), [
             'id' => (int) $credit->public_id,
             'amount' => (float) $credit->amount,
             'balance' => (float) $credit->balance,
             'updated_at' => $this->getTimestamp($credit->updated_at),
             'archived_at' => $this->getTimestamp($credit->deleted_at),
             'is_deleted' => (bool) $credit->is_deleted,
-            'account_key' => $this->account->account_key,
             'credit_date' => $credit->credit_date,
             'credit_number' => $credit->credit_number,
             'private_notes' => $credit->private_notes,
-        ];
+        ]);
     }
 }
\ No newline at end of file
diff --git a/app/Ninja/Transformers/DocumentTransformer.php b/app/Ninja/Transformers/DocumentTransformer.php
index 61d18506eba1..4cbfa0619193 100644
--- a/app/Ninja/Transformers/DocumentTransformer.php
+++ b/app/Ninja/Transformers/DocumentTransformer.php
@@ -8,14 +8,12 @@ class DocumentTransformer extends EntityTransformer
 {
     public function transform(Document $document)
     {
-
-        return [
+        return array_merge($this->getDefaults($document), [
             'id' => (int) $document->public_id,
             'name' => $document->name,
-            'account_key' => $this->account->account_key,
             'type' =>  $document->type,
             'invoice_id' => isset($document->invoice->public_id) ? (int) $document->invoice->public_id : null,
             'expense_id' => isset($document->expense->public_id) ? (int) $document->expense->public_id : null,
-        ];
+        ]);
     }
 }
\ No newline at end of file
diff --git a/app/Ninja/Transformers/EntityTransformer.php b/app/Ninja/Transformers/EntityTransformer.php
index af1304acd67f..d2d02bd0b6ee 100644
--- a/app/Ninja/Transformers/EntityTransformer.php
+++ b/app/Ninja/Transformers/EntityTransformer.php
@@ -1,5 +1,6 @@
 <?php namespace App\Ninja\Transformers;
 
+use Auth;
 use App\Models\Account;
 use App\Models\Client;
 use League\Fractal\TransformerAbstract;
@@ -42,4 +43,18 @@ class EntityTransformer extends TransformerAbstract
     {
         return $this->defaultIncludes;
     }
+    
+    protected function getDefaults($entity)
+    {
+        $data = [
+            'account_key' => $this->account->account_key,
+            'is_owner' => (bool) Auth::user()->owns($entity),
+        ];
+        
+        if ($entity->relationLoaded('user')) {
+            $data['user_id'] = (int) $entity->user->public_id + 1;
+        }
+        
+        return $data;
+    }
 }
diff --git a/app/Ninja/Transformers/ExpenseTransformer.php b/app/Ninja/Transformers/ExpenseTransformer.php
index 8f2e02c0a88f..46c334cb3e55 100644
--- a/app/Ninja/Transformers/ExpenseTransformer.php
+++ b/app/Ninja/Transformers/ExpenseTransformer.php
@@ -15,7 +15,7 @@ class ExpenseTransformer extends EntityTransformer
 
     public function transform(Expense $expense)
     {
-        return [
+        return array_merge($this->getDefaults($expense), [
             'id' => (int) $expense->public_id,
             'private_notes' => $expense->private_notes,
             'public_notes' => $expense->public_notes,
@@ -25,7 +25,6 @@ class ExpenseTransformer extends EntityTransformer
             'transaction_id' => $expense->transaction_id,
             'bank_id' => $expense->bank_id,
             'expense_currency_id' => (int) $expense->expense_currency_id,
-            'account_key' => $this->account->account_key,
             'amount' => (float) $expense->amount,
             'expense_date' => $expense->expense_date,
             'exchange_rate' => (float) $expense->exchange_rate,
@@ -34,6 +33,6 @@ class ExpenseTransformer extends EntityTransformer
             'client_id' => $this->client ? $this->client->public_id : (isset($expense->client->public_id) ? (int) $expense->client->public_id : null),
             'invoice_id' => isset($expense->invoice->public_id) ? (int) $expense->invoice->public_id : null,
             'vendor_id' => isset($expense->vendor->public_id) ? (int) $expense->vendor->public_id : null,
-        ];
+        ]);
     }
 }
\ No newline at end of file
diff --git a/app/Ninja/Transformers/InvoiceItemTransformer.php b/app/Ninja/Transformers/InvoiceItemTransformer.php
index 895d8e8d2f4a..080234f35e1b 100644
--- a/app/Ninja/Transformers/InvoiceItemTransformer.php
+++ b/app/Ninja/Transformers/InvoiceItemTransformer.php
@@ -8,11 +8,9 @@ class InvoiceItemTransformer extends EntityTransformer
 {
     public function transform(InvoiceItem $item)
     {
-        return [
+        return array_merge($this->getDefaults($item), [
             'id' => (int) $item->public_id,
             'product_key' => $item->product_key,
-            'account_key' => $this->account->account_key,
-            'user_id' => (int) $item->user_id,
             'updated_at' => $this->getTimestamp($item->updated_at),
             'archived_at' => $this->getTimestamp($item->deleted_at),
             'product_key' => $item->product_key,
@@ -23,6 +21,6 @@ class InvoiceItemTransformer extends EntityTransformer
             'tax_rate1' => (float) $item->tax_rate1,
             'tax_name2' => $item->tax_name2 ? $item->tax_name1 : '',
             'tax_rate2' => (float) $item->tax_rate2,
-        ];
+        ]);
     }
 }
\ No newline at end of file
diff --git a/app/Ninja/Transformers/InvoiceTransformer.php b/app/Ninja/Transformers/InvoiceTransformer.php
index 51af3d029936..0933422875c2 100644
--- a/app/Ninja/Transformers/InvoiceTransformer.php
+++ b/app/Ninja/Transformers/InvoiceTransformer.php
@@ -71,7 +71,7 @@ class InvoiceTransformer extends EntityTransformer
 
     public function transform(Invoice $invoice)
     {
-        return [
+        return array_merge($this->getDefaults($invoice), [
             'id' => (int) $invoice->public_id,
             'amount' => (float) $invoice->amount,
             'balance' => (float) $invoice->balance,
@@ -105,8 +105,6 @@ class InvoiceTransformer extends EntityTransformer
             'partial' => (float) $invoice->partial,
             'has_tasks' => (bool) $invoice->has_tasks,
             'auto_bill' => (bool) $invoice->auto_bill,
-            'account_key' => $this->account->account_key,
-            'user_id' => (int) $invoice->user->public_id + 1,
             'custom_value1' => (float) $invoice->custom_value1,
             'custom_value2' => (float) $invoice->custom_value2,
             'custom_taxes1' => (bool) $invoice->custom_taxes1,
@@ -115,6 +113,6 @@ class InvoiceTransformer extends EntityTransformer
             'quote_invoice_id' => (int) $invoice->quote_invoice_id,
             'custom_text_value1' => $invoice->custom_text_value1,
             'custom_text_value2' => $invoice->custom_text_value2,
-        ];
+        ]);
     }
 }
diff --git a/app/Ninja/Transformers/PaymentTransformer.php b/app/Ninja/Transformers/PaymentTransformer.php
index 8ea2dcbae051..c4e4328cb845 100644
--- a/app/Ninja/Transformers/PaymentTransformer.php
+++ b/app/Ninja/Transformers/PaymentTransformer.php
@@ -47,11 +47,9 @@ class PaymentTransformer extends EntityTransformer
 
     public function transform(Payment $payment)
     {
-        return [
+        return array_merge($this->getDefaults($payment), [
             'id' => (int) $payment->public_id,
             'amount' => (float) $payment->amount,
-            'account_key' => $this->account->account_key,
-            'user_id' => (int) $payment->user->public_id + 1,
             'transaction_reference' => $payment->transaction_reference,
             'payment_date' => $payment->payment_date,
             'updated_at' => $this->getTimestamp($payment->updated_at),
@@ -59,6 +57,6 @@ class PaymentTransformer extends EntityTransformer
             'is_deleted' => (bool) $payment->is_deleted,
             'payment_type_id' => (int) $payment->payment_type_id,
             'invoice_id' => (int) ($this->invoice ? $this->invoice->public_id : $payment->invoice->public_id),
-        ];
+        ]);
     }
 }
\ No newline at end of file
diff --git a/app/Ninja/Transformers/ProductTransformer.php b/app/Ninja/Transformers/ProductTransformer.php
index 34fbcf7f18ff..8331d7666154 100644
--- a/app/Ninja/Transformers/ProductTransformer.php
+++ b/app/Ninja/Transformers/ProductTransformer.php
@@ -7,16 +7,15 @@ class ProductTransformer extends EntityTransformer
 {
     public function transform(Product $product)
     {
-        return [
+        return array_merge($this->getDefaults(), [
             'id' => (int) $product->public_id,
             'product_key' => $product->product_key,
             'notes' => $product->notes,
             'cost' => $product->cost,
             'qty' => $product->qty,
-            'account_key' =>$this->account->account_key,
             'default_tax_rate_id' =>$product->default_tax_rate_id,
             'updated_at' =>$this->getTimestamp($product->updated_at),
             'archived_at' => $this->getTimestamp($product->deleted_at),
-        ];
+        ]);
     }
 }
\ No newline at end of file
diff --git a/app/Ninja/Transformers/TaskTransformer.php b/app/Ninja/Transformers/TaskTransformer.php
index 908a8118aaea..7bfc474a72f2 100644
--- a/app/Ninja/Transformers/TaskTransformer.php
+++ b/app/Ninja/Transformers/TaskTransformer.php
@@ -39,12 +39,10 @@ class TaskTransformer extends EntityTransformer
 
     public function transform(Task $task)
     {
-        return [
+        return array_merge($this->getDefaults($task), [
             'id' => (int) $task->public_id,
-            'account_key' => $this->account->account_key,
-            'user_id' => (int) $task->user->public_id + 1,
             'description' => $task->description,
             'duration' => $task->getDuration()
-        ];
+        ]);
     }
 }
\ No newline at end of file
diff --git a/app/Ninja/Transformers/TaxRateTransformer.php b/app/Ninja/Transformers/TaxRateTransformer.php
index f7d307bf7bb4..a0c5aab539a0 100644
--- a/app/Ninja/Transformers/TaxRateTransformer.php
+++ b/app/Ninja/Transformers/TaxRateTransformer.php
@@ -21,13 +21,12 @@ class TaxRateTransformer extends EntityTransformer
 
     public function transform(TaxRate $taxRate)
     {
-        return [
+        return array_merge($this->getDefaults($taxRate), [
             'id' => (int) $taxRate->public_id,
             'name' => $taxRate->name,
             'rate' => (float) $taxRate->rate,
             'updated_at' => $this->getTimestamp($taxRate->updated_at),
             'archived_at' => $this->getTimestamp($taxRate->deleted_at),
-            'account_key' => $this->account->account_key,
-            ];
+        ]);
     }
 }
\ No newline at end of file
diff --git a/app/Ninja/Transformers/VendorContactTransformer.php b/app/Ninja/Transformers/VendorContactTransformer.php
index 3b75aee53a28..f277964cec28 100644
--- a/app/Ninja/Transformers/VendorContactTransformer.php
+++ b/app/Ninja/Transformers/VendorContactTransformer.php
@@ -8,7 +8,7 @@ class VendorContactTransformer extends EntityTransformer
 {
     public function transform(VendorContact $contact)
     {
-        return [
+        return array_merge($this->getDefaults($contact), [
             'id' => (int) $contact->public_id,
             'first_name' => $contact->first_name,
             'last_name' => $contact->last_name,
@@ -17,7 +17,6 @@ class VendorContactTransformer extends EntityTransformer
             'archived_at' => $this->getTimestamp($contact->deleted_at),
             'is_primary' => (bool) $contact->is_primary,
             'phone' => $contact->phone,
-            'account_key' => $this->account->account_key,
-        ];
+        ]);
     }
 }
\ No newline at end of file
diff --git a/app/Ninja/Transformers/VendorTransformer.php b/app/Ninja/Transformers/VendorTransformer.php
index f0b8fd0415f0..f9c37ac44200 100644
--- a/app/Ninja/Transformers/VendorTransformer.php
+++ b/app/Ninja/Transformers/VendorTransformer.php
@@ -61,13 +61,11 @@ class VendorTransformer extends EntityTransformer
 
     public function transform(Vendor $vendor)
     {
-        return [
+        return array_merge($this->getDefaults($vendor), [
             'id' => (int) $vendor->public_id,
             'name' => $vendor->name,
             'balance' => (float) $vendor->balance,
             'paid_to_date' => (float) $vendor->paid_to_date,
-            'user_id' => (int) $vendor->user->public_id + 1,
-            'account_key' => $this->account->account_key,
             'updated_at' => $this->getTimestamp($vendor->updated_at),
             'archived_at' => $this->getTimestamp($vendor->deleted_at),
             'address1' => $vendor->address1,
@@ -84,6 +82,6 @@ class VendorTransformer extends EntityTransformer
             'vat_number' => $vendor->vat_number,
             'id_number' => $vendor->id_number,
             'currency_id' => (int) $vendor->currency_id
-        ];
+        ]);
     }
 }
\ No newline at end of file