diff --git a/composer.json b/composer.json
index d180846..57110e2 100644
--- a/composer.json
+++ b/composer.json
@@ -1,6 +1,6 @@
 {
   "name": "silbeckdevs/erede-php",
-  "version": "1.0.1",
+  "version": "1.0.2",
   "description": "e.Rede integration SDK",
   "minimum-stability": "stable",
   "license": "MIT",
diff --git a/src/Rede/Transaction.php b/src/Rede/Transaction.php
index cb4df16..f51d54c 100644
--- a/src/Rede/Transaction.php
+++ b/src/Rede/Transaction.php
@@ -736,7 +736,7 @@ public function jsonUnserialize(string $serialized): static
 
         foreach (get_object_vars($properties) as $property => $value) {
             // TODO verify why use urls in request and not use links in response
-            if ('links' === $property) {
+            if ('links' === $property || null === $value) {
                 continue;
             }
 
@@ -853,4 +853,12 @@ private function unserializeQrCode(string $property, mixed $value): void
             $this->qrCode = (new QrCode())->populate($value);
         }
     }
+
+    public function getFirstAuthorizationCode(): ?string
+    {
+        return $this->getAuthorizationCode()
+            ?: $this->getBrand()?->getAuthorizationCode()
+            ?: $this->getAuthorization()?->getAuthorizationCode()
+            ?: $this->getAuthorization()?->getBrand()?->getAuthorizationCode();
+    }
 }
diff --git a/tests/Unit/TransactionUnitTest.php b/tests/Unit/TransactionUnitTest.php
index 64d8924..5f556ea 100644
--- a/tests/Unit/TransactionUnitTest.php
+++ b/tests/Unit/TransactionUnitTest.php
@@ -63,6 +63,56 @@ public function testShouldPopulateAuthorization(): void
         $this->assertSame('306718396', $transaction->getCapture()->getNsu());
     }
 
+    public function testGetAuthorizationCodeValid(): void
+    {
+        // Cenário 1: AuthorizationCode diretamente na transação
+        $transaction = (new Transaction())->jsonUnserialize($this->serializeJsonTransaction([
+            'authorizationCode' => '111111',
+        ]));
+        $this->assertSame('111111', $transaction->getFirstAuthorizationCode());
+
+        // Cenário 2: AuthorizationCode no Brand
+        $transaction = (new Transaction())->jsonUnserialize($this->serializeJsonTransaction([
+            'authorizationCode' => null,
+            'brand' => [
+                'authorizationCode' => '222222',
+            ],
+        ]));
+        $this->assertSame('222222', $transaction->getFirstAuthorizationCode());
+
+        // Cenário 3: AuthorizationCode no Authorization
+        $transaction = (new Transaction())->jsonUnserialize($this->serializeJsonTransaction([
+            'brand' => null,
+            'authorization' => [
+                'authorizationCode' => '333333',
+            ],
+        ]));
+        $this->assertSame('333333', $transaction->getFirstAuthorizationCode());
+
+        // Cenário 4: AuthorizationCode no Brand dentro do Authorization
+        $transaction = (new Transaction())->jsonUnserialize($this->serializeJsonTransaction([
+            'authorization' => [
+                'brand' => [
+                    'authorizationCode' => '444444',
+                ],
+            ],
+        ]));
+        $this->assertSame('444444', $transaction->getFirstAuthorizationCode());
+
+        // Cenário 5: Nenhum código de autorização disponível
+        $transaction = (new Transaction())->jsonUnserialize($this->serializeJsonTransaction([
+            'authorization' => null,
+            'brand' => null,
+            'authorizationCode' => null,
+        ]));
+        $this->assertNull($transaction->getFirstAuthorizationCode());
+    }
+
+    private function serializeJsonTransaction(mixed $body): string
+    {
+        return json_encode($body) ?: '{}';
+    }
+
     private function getJsonTransactionMock(): string
     {
         return '