diff --git a/app/src/Model/MediosPago/Toku/Customer.php b/app/src/Model/MediosPago/Toku/Customer.php
index 13b710e..65e116f 100644
--- a/app/src/Model/MediosPago/Toku/Customer.php
+++ b/app/src/Model/MediosPago/Toku/Customer.php
@@ -9,10 +9,15 @@ class Customer extends Ideal\Model
     public Persona $persona;
     public string $toku_id;
 
+    public function rut(): string
+    {
+        return implode('', [$this->persona->rut, strtoupper($this->persona->digito)]);
+    }
+
     protected function jsonComplement(): array
     {
         return [
-            'rut' => implode('', [$this->persona->rut, $this->persona->digito]),
+            'rut' => $this->rut(),
             'toku_id' => $this->toku_id
         ];
     }