diff --git a/app/Http/Controllers/ClientPortal/InvitationController.php b/app/Http/Controllers/ClientPortal/InvitationController.php
index 199497ccd7df..48b4a455754b 100644
--- a/app/Http/Controllers/ClientPortal/InvitationController.php
+++ b/app/Http/Controllers/ClientPortal/InvitationController.php
@@ -22,6 +22,7 @@ use App\Models\ClientContact;
 use App\Models\CreditInvitation;
 use App\Models\InvoiceInvitation;
 use App\Models\Payment;
+use App\Models\PurchaseOrderInvitation;
 use App\Models\QuoteInvitation;
 use App\Services\ClientPortal\InstantPayment;
 use App\Utils\CurlUtils;
@@ -41,7 +42,7 @@ class InvitationController extends Controller
     use MakesDates;
 
     public function router(string $entity, string $invitation_key)
-    {   
+    {
         Auth::logout();
 
         return $this->genericRouter($entity, $invitation_key);
@@ -166,7 +167,7 @@ class InvitationController extends Controller
     {
 
         set_time_limit(45);
-        
+
         if(Ninja::isHosted())
             return $this->returnRawPdf($entity, $invitation_key);
 
@@ -202,7 +203,7 @@ class InvitationController extends Controller
         return response()->streamDownload(function () use($file) {
                 echo $file;
         },  $file_name, $headers);
-        
+
     }
 
     public function routerForIframe(string $entity, string $client_hash, string $invitation_key)
@@ -228,14 +229,14 @@ class InvitationController extends Controller
         $invitation = InvoiceInvitation::where('key', $invitation_key)
                                     ->with('contact.client')
                                     ->firstOrFail();
-        
+
         auth()->guard('contact')->loginUsingId($invitation->contact->id, true);
 
         $invoice = $invitation->invoice;
 
         if($invoice->partial > 0)
             $amount = round($invoice->partial, (int)$invoice->client->currency()->precision);
-        else 
+        else
             $amount = round($invoice->balance, (int)$invoice->client->currency()->precision);
 
         $gateways = $invitation->contact->client->service()->getPaymentMethods($amount);
@@ -279,6 +280,10 @@ class InvitationController extends Controller
             $invite = CreditInvitation::withTrashed()->where('key', $invitation_key)->first();
             $invite->contact->send_email = false;
             $invite->contact->save();
+        }elseif($entity == 'purchase_order'){
+            $invite = PurchaseOrderInvitation::withTrashed()->where('key', $invitation_key)->first();
+            $invite->contact->send_email = false;
+            $invite->contact->save();
         }
         else
             return abort(404);
diff --git a/app/Models/PurchaseOrder.php b/app/Models/PurchaseOrder.php
index 4d73c609559d..3a82bb9215f8 100644
--- a/app/Models/PurchaseOrder.php
+++ b/app/Models/PurchaseOrder.php
@@ -12,8 +12,12 @@
 namespace App\Models;
 
 
+use App\Jobs\Entity\CreateEntityPdf;
 use App\Services\PurchaseOrder\PurchaseOrderService;
+use App\Utils\Ninja;
 use Illuminate\Database\Eloquent\SoftDeletes;
+use Illuminate\Support\Carbon;
+use Illuminate\Support\Facades\Storage;
 
 class PurchaseOrder extends BaseModel
 {
@@ -129,11 +133,52 @@ class PurchaseOrder extends BaseModel
     {
         return $this->belongsTo(Client::class)->withTrashed();
     }
+    public function markInvitationsSent()
+    {
+        $this->invitations->each(function ($invitation) {
+            if (! isset($invitation->sent_date)) {
+                $invitation->sent_date = Carbon::now();
+                $invitation->save();
+            }
+        });
+    }
 
+    public function pdf_file_path($invitation = null, string $type = 'path', bool $portal = false)
+    {
+        if (! $invitation) {
+
+            if($this->invitations()->exists())
+                $invitation = $this->invitations()->first();
+            else{
+                $this->service()->createInvitations();
+                $invitation = $this->invitations()->first();
+            }
+
+        }
+
+        if(!$invitation)
+            throw new \Exception('Hard fail, could not create an invitation - is there a valid contact?');
+
+        $file_path = $this->client->credit_filepath($invitation).$this->numberFormatter().'.pdf';
+
+        if(Ninja::isHosted() && $portal && Storage::disk(config('filesystems.default'))->exists($file_path)){
+            return Storage::disk(config('filesystems.default'))->{$type}($file_path);
+        }
+        elseif(Ninja::isHosted() && $portal){
+            $file_path = CreateEntityPdf::dispatchNow($invitation,config('filesystems.default'));
+            return Storage::disk(config('filesystems.default'))->{$type}($file_path);
+        }
+
+        if(Storage::disk('public')->exists($file_path))
+            return Storage::disk('public')->{$type}($file_path);
+
+        $file_path = CreateEntityPdf::dispatchNow($invitation);
+        return Storage::disk('public')->{$type}($file_path);
+    }
 
     public function invitations()
     {
-        return $this->hasMany(CreditInvitation::class);
+        return $this->hasMany(PurchaseOrderInvitation::class);
     }
 
     public function project()