diff --git a/app/Exceptions/PointException.php b/app/Exceptions/PointException.php
index 1102ad1b1..5e4fdf1e8 100644
--- a/app/Exceptions/PointException.php
+++ b/app/Exceptions/PointException.php
@@ -6,8 +6,8 @@
 
 class PointException extends Exception
 {
-    public function __construct()
+    public function __construct($message = 'something went wrong')
     {
-        parent::__construct('something went wrong', 422);
+        parent::__construct($message, 422);
     }
 }
diff --git a/app/Model/Finance/Payment/Payment.php b/app/Model/Finance/Payment/Payment.php
index 83cc1b7d2..97c8c8306 100644
--- a/app/Model/Finance/Payment/Payment.php
+++ b/app/Model/Finance/Payment/Payment.php
@@ -4,7 +4,6 @@
 
 use App\Exceptions\BranchNullException;
 use App\Exceptions\PointException;
-use App\Model\Accounting\ChartOfAccount;
 use App\Model\Accounting\Journal;
 use App\Model\Finance\PaymentOrder\PaymentOrder;
 use App\Model\Form;
@@ -36,29 +35,6 @@ class Payment extends TransactionModel
         'amount' => 'double',
     ];
 
-    public function paymentAccount()
-    {
-        return $this->belongsTo(ChartOfAccount::class, 'payment_account_id');
-    }
-
-    public function details()
-    {
-        return $this->hasMany(PaymentDetail::class, 'payment_id');
-    }
-
-    public function form()
-    {
-        return $this->morphOne(Form::class, 'formable');
-    }
-
-    /**
-     * Get all of the owning paymentable models.
-     */
-    public function paymentable()
-    {
-        return $this->morphTo();
-    }
-
     public function isAllowedToUpdate()
     {
         // TODO isAllowed to update?
diff --git a/app/Model/Finance/PaymentOrder/PaymentOrder.php b/app/Model/Finance/PaymentOrder/PaymentOrder.php
index 068339971..4a44abd6c 100644
--- a/app/Model/Finance/PaymentOrder/PaymentOrder.php
+++ b/app/Model/Finance/PaymentOrder/PaymentOrder.php
@@ -3,6 +3,7 @@
 namespace App\Model\Finance\PaymentOrder;
 
 use App\Exceptions\IsReferencedException;
+use App\Exceptions\PointException;
 use App\Model\Form;
 use App\Model\TransactionModel;
 use App\Traits\Model\Finance\PaymentOrderJoin;
@@ -53,17 +54,17 @@ public function setPaymentTypeAttribute($value)
 
     public function isAllowedToUpdate()
     {
-        // Check if not referenced by purchase order
+        // Check if not referenced by another form
         if (optional($this->payment)->count()) {
-            throw new IsReferencedException('Cannot edit form because referenced by purchase receive', $this->payment);
+            throw new IsReferencedException('Cannot edit form because it is already paid', $this->payment);
         }
     }
 
     public function isAllowedToDelete()
     {
-        // Check if not referenced by purchase order
+        // Check if not referenced by another form
         if (optional($this->payment)->count()) {
-            throw new IsReferencedException('Cannot edit form because referenced by purchase receive', $this->payment);
+            throw new IsReferencedException('Cannot delete form because it is already paid', $this->payment);
         }
     }
 
@@ -75,6 +76,11 @@ public static function create($data)
         $paymentOrderDetails = self::mapPaymentOrderDetails($data['details'] ?? []);
 
         $paymentOrder->amount = self::calculateAmount($paymentOrderDetails);
+
+        if ($paymentOrder->amount < 0) {
+            throw new PointException('You have negative amount');
+        }
+
         $paymentOrder->paymentable_name = $paymentOrder->paymentable->name;
         $paymentOrder->save();
 
diff --git a/app/Traits/Model/Finance/PaymentRelation.php b/app/Traits/Model/Finance/PaymentRelation.php
index f766ca409..ba6097fde 100644
--- a/app/Traits/Model/Finance/PaymentRelation.php
+++ b/app/Traits/Model/Finance/PaymentRelation.php
@@ -3,7 +3,9 @@
 namespace App\Traits\Model\Finance;
 
 
+use App\Model\Accounting\ChartOfAccount;
 use App\Model\Finance\Payment\Payment;
+use App\Model\Finance\Payment\PaymentDetail;
 use App\Model\Finance\PaymentOrder\PaymentOrderDetail;
 use App\Model\Form;
 use App\Model\Purchase\PurchaseOrder\PurchaseOrder;
@@ -25,9 +27,14 @@ public function paymentable()
         return $this->morphTo();
     }
 
+    public function paymentAccount()
+    {
+        return $this->belongsTo(ChartOfAccount::class, 'payment_account_id');
+    }
+
     public function details()
     {
-        return $this->hasMany(PaymentOrderDetail::class);
+        return $this->hasMany(PaymentDetail::class, 'payment_id');
     }
 
     // Select relation that not archived and not canceled