diff --git a/config/search-string.php b/config/search-string.php
index f65dfa820..ad9048e41 100644
--- a/config/search-string.php
+++ b/config/search-string.php
@@ -295,6 +295,24 @@ return [
         ],
     ],
 
+    App\Models\Portal\Sale\Invoice::class => [
+        'columns' => [
+            'document_number' => ['searchable' => true],
+            'order_number' => ['searchable' => true],
+            'status',
+            'issued_at' => [
+                'key' => 'invoiced_at',
+                'date' => true,
+            ],
+            'due_at' => ['date' => true],
+            'amount',
+            'currency_code' => [
+                'route' => 'portal.payment.currencies'
+            ],
+            'parent_id',
+        ],
+    ],
+
     App\Models\Portal\Banking\Transaction::class => [
         'columns' => [
             'paid_at' => ['date' => true],
diff --git a/resources/views/portal/invoices/index.blade.php b/resources/views/portal/invoices/index.blade.php
index 69471d5eb..8e0892bc7 100644
--- a/resources/views/portal/invoices/index.blade.php
+++ b/resources/views/portal/invoices/index.blade.php
@@ -17,6 +17,7 @@
         class-issued-at="col-sm-3 col-md-3 d-none d-sm-block"
         class-due-at="col-md-2 d-none d-md-block"
         class-status="col-xs-4 col-sm-3 col-md-2 text-center"
+        search-string-model="App\Models\Portal\Sale\Invoice"
     />
 @endsection