diff --git a/app/Http/Controllers/V1/Admin/Settings/CompanyCurrencyTransactionController.php b/app/Http/Controllers/V1/Admin/Settings/CompanyCurrencyCheckTransactionsController.php
similarity index 67%
rename from app/Http/Controllers/V1/Admin/Settings/CompanyCurrencyTransactionController.php
rename to app/Http/Controllers/V1/Admin/Settings/CompanyCurrencyCheckTransactionsController.php
index 0977de23..ee9ce1b9 100644
--- a/app/Http/Controllers/V1/Admin/Settings/CompanyCurrencyTransactionController.php
+++ b/app/Http/Controllers/V1/Admin/Settings/CompanyCurrencyCheckTransactionsController.php
@@ -8,7 +8,7 @@ use Crater\Models\CompanySetting;
 use Crater\Models\Currency;
 use Illuminate\Http\Request;
 
-class CompanyCurrencyTransactionController extends Controller
+class CompanyCurrencyCheckTransactionsController extends Controller
 {
     /**
      * Handle the incoming request.
@@ -24,15 +24,7 @@ class CompanyCurrencyTransactionController extends Controller
 
         $currency = Currency::find((int)$companyCurrency);
 
-        if (
-            $currency->customers()->exists() ||
-            $currency->items()->exists() ||
-            $currency->invoices()->exists() ||
-            $currency->estimates()->exists() ||
-            $currency->expenses()->exists() ||
-            $currency->payments()->exists() ||
-            $currency->recurringInvoices()->exists()
-        ) {
+        if ($currency->checkTransactions()) {
             return response()->json([
                 'success' => false,
             ]);
diff --git a/app/Http/Controllers/V1/Admin/Settings/UpdateCompanySettingsController.php b/app/Http/Controllers/V1/Admin/Settings/UpdateCompanySettingsController.php
index 264b0af7..eb6f1f2b 100644
--- a/app/Http/Controllers/V1/Admin/Settings/UpdateCompanySettingsController.php
+++ b/app/Http/Controllers/V1/Admin/Settings/UpdateCompanySettingsController.php
@@ -6,6 +6,7 @@ use Crater\Http\Controllers\Controller;
 use Crater\Http\Requests\UpdateSettingsRequest;
 use Crater\Models\Company;
 use Crater\Models\CompanySetting;
+use Crater\Models\Currency;
 
 class UpdateCompanySettingsController extends Controller
 {
@@ -19,7 +20,19 @@ class UpdateCompanySettingsController extends Controller
     {
         $this->authorize('manage company', Company::find($request->header('company')));
 
-        CompanySetting::setSettings($request->settings, $request->header('company'));
+        $companyCurrency = CompanySetting::getSetting('currency', $request->header('company'));
+
+        $data = $request->settings;
+        $currency = Currency::find((int)$companyCurrency);
+
+        if ($companyCurrency !== $data['currency'] && $currency->checkTransactions()) {
+            return response()->json([
+                'success' => false,
+                'message' => 'You cannot change currency once transaction is created.'
+            ]);
+        }
+
+        CompanySetting::setSettings($data, $request->header('company'));
 
         return response()->json([
             'success' => true,
diff --git a/app/Models/Currency.php b/app/Models/Currency.php
index f777585c..5b8a3fb0 100644
--- a/app/Models/Currency.php
+++ b/app/Models/Currency.php
@@ -47,4 +47,21 @@ class Currency extends Model
     {
         return $this->hasMany(RecurringInvoice::class);
     }
+
+    public function checkTransactions()
+    {
+        if (
+            $this->customers()->exists() ||
+            $this->items()->exists() ||
+            $this->invoices()->exists() ||
+            $this->estimates()->exists() ||
+            $this->expenses()->exists() ||
+            $this->payments()->exists() ||
+            $this->recurringInvoices()->exists()
+        ) {
+            return true;
+        }
+
+        return false;
+    }
 }
diff --git a/app/Models/Invoice.php b/app/Models/Invoice.php
index ca6c765e..464390af 100644
--- a/app/Models/Invoice.php
+++ b/app/Models/Invoice.php
@@ -27,7 +27,6 @@ class Invoice extends Model implements HasMedia
 
     public const STATUS_DRAFT = 'DRAFT';
     public const STATUS_SENT = 'SENT';
-    public const STATUS_OVERDUE = 'OVERDUE';
     public const STATUS_VIEWED = 'VIEWED';
     public const STATUS_COMPLETED = 'COMPLETED';
 
diff --git a/database/migrations/2022_03_03_063237_change_over_due_status_to_sent.php b/database/migrations/2022_03_03_063237_change_over_due_status_to_sent.php
index f2d92bc3..a87a7351 100644
--- a/database/migrations/2022_03_03_063237_change_over_due_status_to_sent.php
+++ b/database/migrations/2022_03_03_063237_change_over_due_status_to_sent.php
@@ -12,7 +12,7 @@ class ChangeOverDueStatusToSent extends Migration
      */
     public function up()
     {
-        $overdueInvoices = Invoice::where('status', Invoice::STATUS_OVERDUE)->get();
+        $overdueInvoices = Invoice::where('status', 'OVERDUE')->get();
 
         if ($overdueInvoices) {
             $overdueInvoices->map(function ($overdueInvoice) {
diff --git a/routes/api.php b/routes/api.php
index d1c63fc9..b81cbd79 100644
--- a/routes/api.php
+++ b/routes/api.php
@@ -67,7 +67,7 @@ use Crater\Http\Controllers\V1\Admin\RecurringInvoice\RecurringInvoiceFrequencyC
 use Crater\Http\Controllers\V1\Admin\Role\AbilitiesController;
 use Crater\Http\Controllers\V1\Admin\Role\RolesController;
 use Crater\Http\Controllers\V1\Admin\Settings\CompanyController;
-use Crater\Http\Controllers\V1\Admin\Settings\CompanyCurrencyTransactionController;
+use Crater\Http\Controllers\V1\Admin\Settings\CompanyCurrencyCheckTransactionsController;
 use Crater\Http\Controllers\V1\Admin\Settings\DiskController;
 use Crater\Http\Controllers\V1\Admin\Settings\GetCompanyMailConfigurationController;
 use Crater\Http\Controllers\V1\Admin\Settings\GetCompanySettingsController;
@@ -395,7 +395,7 @@ Route::prefix('/v1')->group(function () {
 
             Route::post('/settings', UpdateSettingsController::class);
 
-            Route::get('/company-currency-transaction', CompanyCurrencyTransactionController::class);
+            Route::get('/company/has-transactions', CompanyCurrencyCheckTransactionsController::class);
 
 
             // Mails