diff --git a/README.md b/README.md
index e42f53e..b43c097 100644
--- a/README.md
+++ b/README.md
@@ -155,14 +155,21 @@ BitinflowAccounts::withClientId('abc123')->withToken('abcdef123456')->getAuthedU
 public function createCharge(array $parameters)
 public function getCharge(string $id)
 public function updateCharge(string $id, array $parameters)
-public function captureCharge(string $id, array $parameters = [])
+public function captureCharge(string $id, array $parameters = array ())
 ```
 
-### CheckoutSessions
+### Documents
 
 ```php
-public function getCheckoutSession(string $id)
-public function createCheckoutSession(array $parameters)
+public function createDocument(array $parameters)
+public function createDocumentDownloadUrl(string $identifier, CarbonInterface $expiresAt = NULL)
+```
+
+### PaymentIntents
+
+```php
+public function getPaymentIntent(string $id)
+public function createPaymentIntent(array $parameters)
 ```
 
 ### SshKeys
diff --git a/README.stub b/README.stub
index 167870d..51d1f12 100644
--- a/README.stub
+++ b/README.stub
@@ -9,9 +9,10 @@ PHP bitinflow Accounts API Client for Laravel 5+
 ## Table of contents
 
 1. [Installation](#installation)
-2. [Configuration](#configuration)
-3. [Examples](#examples)
-4. [Documentation](#documentation)
+2. [Event Listener](#event-listener)
+3. [Configuration](#configuration)
+4. [Examples](#examples)
+5. [Documentation](#documentation)
 6. [Development](#Development)
 
 ## Installation
diff --git a/src/GhostZero/BitinflowAccounts/Traits/DocumentsTrait.php b/src/GhostZero/BitinflowAccounts/Traits/DocumentsTrait.php
index 5a7273e..995e06b 100644
--- a/src/GhostZero/BitinflowAccounts/Traits/DocumentsTrait.php
+++ b/src/GhostZero/BitinflowAccounts/Traits/DocumentsTrait.php
@@ -32,12 +32,12 @@ trait DocumentsTrait
     /**
      * Create a Documents download url
      *
-     * @param mixed                $identifier
+     * @param string               $identifier
      * @param CarbonInterface|null $expiresAt
      *
      * @return Result
      */
-    public function createDocumentDownloadUrl($identifier, ?CarbonInterface $expiresAt = null): Result
+    public function createDocumentDownloadUrl(string $identifier, ?CarbonInterface $expiresAt = null): Result
     {
         return $this->post("documents/$identifier/download-url", [
             'expires_at' => $expiresAt