diff --git a/app/Models/SystemLog.php b/app/Models/SystemLog.php
index 37f3f2518e21..0be18903a7d6 100644
--- a/app/Models/SystemLog.php
+++ b/app/Models/SystemLog.php
@@ -34,6 +34,7 @@ class SystemLog extends Model
     const CATEGORY_GATEWAY_RESPONSE = 1;
     const CATEGORY_MAIL = 2;
     const CATEGORY_WEBHOOK = 3;
+    const CATEGORY_PDF = 3;
 
     /* Event IDs*/
     const EVENT_PAYMENT_RECONCILIATION_FAILURE = 10;
@@ -47,7 +48,8 @@ class SystemLog extends Model
     const EVENT_MAIL_RETRY_QUEUE = 31; //we use this to queue emails that are spooled and not sent due to the email queue quota being exceeded.
 
     const EVENT_WEBHOOK_RESPONSE = 40;
-    
+    const EVENT_PDF_RESPONSE = 50;
+
     /*Type IDs*/
     const TYPE_PAYPAL = 300;
     const TYPE_STRIPE = 301;
@@ -60,6 +62,8 @@ class SystemLog extends Model
     const TYPE_UPSTREAM_FAILURE = 401;
 
     const TYPE_WEBHOOK_RESPONSE = 500;
+    const TYPE_PDF_FAILURE = 600;
+    const TYPE_PDF_SUCCESS = 601;
 
     protected $fillable = [
         'client_id',
diff --git a/app/Utils/PhantomJS/Phantom.php b/app/Utils/PhantomJS/Phantom.php
index b3c10a274c94..50796ab5d381 100644
--- a/app/Utils/PhantomJS/Phantom.php
+++ b/app/Utils/PhantomJS/Phantom.php
@@ -11,10 +11,12 @@
 
 namespace App\Utils\PhantomJS;
 
+use App\Jobs\Util\SystemLogger;
 use App\Models\CreditInvitation;
 use App\Models\Design;
 use App\Models\InvoiceInvitation;
 use App\Models\QuoteInvitation;
+use App\Models\SystemLog;
 use App\Services\PdfMaker\Design as PdfDesignModel;
 use App\Services\PdfMaker\Design as PdfMakerDesign;
 use App\Services\PdfMaker\PdfMaker as PdfMakerService;
@@ -77,7 +79,7 @@ class Phantom
         $phantom_url = "https://phantomjscloud.com/api/browser/v2/{$key}/?request=%7Burl:%22{$url}%22,renderType:%22pdf%22%7D";
         $pdf = CurlUtils::get($phantom_url);
 
-        // Storage::makeDirectory($path, 0775);
+        $this->checkMime($pdf, $invitation, $entity);
 
         $instance = Storage::disk(config('filesystems.default'))->put($file_path, $pdf);
 
@@ -101,6 +103,36 @@ class Phantom
         return $response;
     }
 
+    /* Check if the returning PDF is valid. */
+    private function checkMime($pdf, $invitation, $entity)
+    {
+
+        $finfo = new \finfo(FILEINFO_MIME);
+
+        if($finfo->buffer($pdf) != 'application/pdf; charset=binary')
+        {
+            SystemLogger::dispatch(
+                $pdf,
+                SystemLog::CATEGORY_PDF,
+                SystemLog::EVENT_PDF_RESPONSE,
+                SystemLog::TYPE_PDF_FAILURE,
+                $invitation->contact->client
+            );
+        }
+        else {
+
+            SystemLogger::dispatch(
+                "Entity PDF generated sucessfully => " . $invitation->{$entity}->number,
+                SystemLog::CATEGORY_PDF,
+                SystemLog::EVENT_PDF_RESPONSE,
+                SystemLog::TYPE_PDF_SUCCESS,
+                $invitation->contact->client
+            );
+
+        }
+
+    }
+
     public function displayInvitation(string $entity, string $invitation_key)
     {
         $key = $entity.'_id';
diff --git a/tests/Unit/Phantom/PhantomJsTest.php b/tests/Unit/Phantom/PhantomJsTest.php
index 7ac11fdfbc6a..afb13d771dbf 100644
--- a/tests/Unit/Phantom/PhantomJsTest.php
+++ b/tests/Unit/Phantom/PhantomJsTest.php
@@ -35,6 +35,7 @@ class PhantomJsTest extends TestCase
 
     public function testInValidPdfMime()
     {
+
     	$pdf = file_get_contents(base_path('/tests/Unit/Phantom/invalid.pdf'));
 
         $finfo = new \finfo(FILEINFO_MIME);