diff --git a/app/Ship/Parents/Actions/Action.php b/app/Ship/Parents/Actions/Action.php
index 98d0538d2..cfcfd5235 100644
--- a/app/Ship/Parents/Actions/Action.php
+++ b/app/Ship/Parents/Actions/Action.php
@@ -11,11 +11,13 @@
  */
 abstract class Action
 {
-
     use CallableTrait;
 
     /**
-     * @var
+     * Set automatically by the controller after calling an Action.
+     * Allows the Action to know which UI invoke it, to modify it's behaviour based on it, when needed.
+     *
+     * @var string
      */
     protected $ui;
 
diff --git a/app/Ship/Parents/Actions/SubAction.php b/app/Ship/Parents/Actions/SubAction.php
new file mode 100644
index 000000000..3ab52897f
--- /dev/null
+++ b/app/Ship/Parents/Actions/SubAction.php
@@ -0,0 +1,13 @@
+<?php
+
+namespace App\Ship\Parents\Actions;
+
+/**
+ * Class Action.
+ *
+ * @author  Mahmoud Zalt <mahmoud@zalt.me>
+ */
+abstract class SubAction extends Action
+{
+
+}
diff --git a/docs/_docs/D.components/subactions.md b/docs/_docs/D.components/subactions.md
new file mode 100644
index 000000000..9d16855ac
--- /dev/null
+++ b/docs/_docs/D.components/subactions.md
@@ -0,0 +1,55 @@
+---
+title: "Sub Actions"
+category: "Components"
+order: 5
+---
+
+### Definition & Principles
+
+Read from the [**Porto SAP Documentation (#SubActions)**](https://github.com/Mahmoudz/Porto#SubActions).
+
+### Rules
+
+- All SubActions MUST extend from `App\Ship\Parents\Actions\SubAction`.
+
+### Folder Structure
+
+```
+ - app
+    - Containers
+        - {container-name}
+            - Actions
+                - ValidateAddressSubAction.php
+                - BuildOrderSubAction.php
+                - ...
+```
+
+### Code Sample
+
+**ValidateAddressSubAction User Action:**
+
+```php
+<?php
+
+namespace App\Containers\Shipment\Actions;
+
+use App\Containers\Recipient\Models\Recipient;
+use App\Containers\Recipient\Tasks\UpdateRecipientTask;
+use App\Containers\Shipment\Tasks\ValidateAddressWithEasyPostTask;
+use App\Containers\Shipment\Tasks\ValidateAddressWithMelissaDataTask;
+use App\Ship\Parents\Actions\SubAction;
+
+class ValidateAddressSubAction extends SubAction
+{
+    public function run(Recipient $recipient)
+    {
+        $hasValidAddress = true;
+
+        $easyPostResponse = $this->call(ValidateAddressWithEasyPostTask::class, [$recipient]);
+
+        ...
+    }
+}
+```
+
+**Every feature available for Actions, is also available in SubActions.**