diff --git a/app/Http/Controllers/ClientPortalController.php b/app/Http/Controllers/ClientPortalController.php
index aa27130315..d8954717aa 100644
--- a/app/Http/Controllers/ClientPortalController.php
+++ b/app/Http/Controllers/ClientPortalController.php
@@ -227,7 +227,7 @@ class ClientPortalController extends BaseController
         return $pdfString;
     }
 
-    public function sign($invitationKey)
+    public function authorizeInvoice($invitationKey)
     {
         if (! $invitation = $this->invoiceRepo->findInvoiceByInvitation($invitationKey)) {
             return RESULT_FAILURE;
diff --git a/app/Http/Controllers/QuoteController.php b/app/Http/Controllers/QuoteController.php
index 238cad710e..06b363297d 100644
--- a/app/Http/Controllers/QuoteController.php
+++ b/app/Http/Controllers/QuoteController.php
@@ -148,6 +148,11 @@ class QuoteController extends BaseController
     {
         $invitation = Invitation::with('invoice.invoice_items', 'invoice.invitations')->where('invitation_key', '=', $invitationKey)->firstOrFail();
         $invoice = $invitation->invoice;
+        $account = $invoice->account;
+
+        if ($account->requiresAuthorization($invoice) && ! session('authorized:' . $invitation->invitation_key)) {
+            return redirect()->to('view/' . $invitation->invitation_key);
+        }
 
         if ($invoice->due_date) {
             $carbonDueDate = \Carbon::parse($invoice->due_date);
diff --git a/resources/views/invoices/view.blade.php b/resources/views/invoices/view.blade.php
index 4e2cf50dfb..3c8843df41 100644
--- a/resources/views/invoices/view.blade.php
+++ b/resources/views/invoices/view.blade.php
@@ -324,7 +324,7 @@
 					var data = false;
 				@endif
 				$.ajax({
-				    url: "{{ URL::to('sign/' . $invitation->invitation_key) }}",
+				    url: "{{ URL::to('authorize/' . $invitation->invitation_key) }}",
 				    type: 'PUT',
 					data: data,
 				    success: function(response) {
diff --git a/routes/web.php b/routes/web.php
index aced6b9f96..e75e2b1243 100644
--- a/routes/web.php
+++ b/routes/web.php
@@ -19,7 +19,7 @@ Route::group(['middleware' => ['lookup:contact', 'auth:client']], function () {
     Route::get('proposal/{proposal_invitation_key}/download', 'ClientPortalProposalController@downloadProposal');
     Route::get('proposal/{proposal_invitation_key}', 'ClientPortalProposalController@viewProposal');
     Route::get('download/{invitation_key}', 'ClientPortalController@download');
-    Route::put('sign/{invitation_key}', 'ClientPortalController@sign');
+    Route::put('authorize/{invitation_key}', 'ClientPortalController@authorizeInvoice');
     Route::get('view', 'HomeController@viewLogo');
     Route::get('approve/{invitation_key}', 'QuoteController@approve');
     Route::get('payment/{invitation_key}/{gateway_type?}/{source_id?}', 'OnlinePaymentController@showPayment');