diff --git a/app/Models/AccountGateway.php b/app/Models/AccountGateway.php
index ceafdbc01c..f102d4e16f 100644
--- a/app/Models/AccountGateway.php
+++ b/app/Models/AccountGateway.php
@@ -2,6 +2,8 @@
 
 namespace App\Models;
 
+use Utils;
+use HTMLUtils;
 use Crypt;
 use Illuminate\Database\Eloquent\SoftDeletes;
 use Laracasts\Presenter\PresentableTrait;
@@ -291,4 +293,22 @@ class AccountGateway extends EntityModel
             return $this->getConfigField('testMode');
         }
     }
+
+    public function getCustomHtml($invitation)
+    {
+        $text = $this->getConfigField('text');
+
+        if ($text == strip_tags($text)) {
+            $text = nl2br($text);
+        }
+
+        if (Utils::isNinja()) {
+            $text = HTMLUtils::sanitizeHTML($text);
+        }
+
+        $templateService = app('App\Services\TemplateService');
+        $text = $templateService->processVariables($text, ['invitation' => $invitation]);
+
+        return $text;
+    }
 }
diff --git a/app/Ninja/PaymentDrivers/Custom1PaymentDriver.php b/app/Ninja/PaymentDrivers/Custom1PaymentDriver.php
new file mode 100644
index 0000000000..3520e88823
--- /dev/null
+++ b/app/Ninja/PaymentDrivers/Custom1PaymentDriver.php
@@ -0,0 +1,13 @@
+<?php
+
+namespace App\Ninja\PaymentDrivers;
+
+class Custom1PaymentDriver extends BasePaymentDriver
+{
+    public function gatewayTypes()
+    {
+        return [
+            GATEWAY_TYPE_CUSTOM1,
+        ];
+    }
+}
diff --git a/app/Ninja/PaymentDrivers/Custom2PaymentDriver.php b/app/Ninja/PaymentDrivers/Custom2PaymentDriver.php
new file mode 100644
index 0000000000..664a1a757c
--- /dev/null
+++ b/app/Ninja/PaymentDrivers/Custom2PaymentDriver.php
@@ -0,0 +1,13 @@
+<?php
+
+namespace App\Ninja\PaymentDrivers;
+
+class Custom2PaymentDriver extends BasePaymentDriver
+{
+    public function gatewayTypes()
+    {
+        return [
+            GATEWAY_TYPE_CUSTOM2,
+        ];
+    }
+}
diff --git a/app/Ninja/PaymentDrivers/Custom3PaymentDriver.php b/app/Ninja/PaymentDrivers/Custom3PaymentDriver.php
new file mode 100644
index 0000000000..68af834519
--- /dev/null
+++ b/app/Ninja/PaymentDrivers/Custom3PaymentDriver.php
@@ -0,0 +1,13 @@
+<?php
+
+namespace App\Ninja\PaymentDrivers;
+
+class Custom3PaymentDriver extends BasePaymentDriver
+{
+    public function gatewayTypes()
+    {
+        return [
+            GATEWAY_TYPE_CUSTOM3,
+        ];
+    }
+}
diff --git a/app/Services/TemplateService.php b/app/Services/TemplateService.php
index ab85a2a067..2c5d3c64a3 100644
--- a/app/Services/TemplateService.php
+++ b/app/Services/TemplateService.php
@@ -18,15 +18,17 @@ class TemplateService
      */
     public function processVariables($template, array $data)
     {
-        /** @var \App\Models\Account $account */
-        $account = $data['account'];
-
-        /** @var \App\Models\Client $client */
-        $client = $data['client'];
-
         /** @var \App\Models\Invitation $invitation */
         $invitation = $data['invitation'];
 
+        /** @var \App\Models\Account $account */
+        $account = ! empty($data['account']) ? $data['account'] : $invitation->account;
+
+        /** @var \App\Models\Client $client */
+        $client = ! empty($data['client']) ? $data['client'] : $invitation->invoice->client;
+
+        $amount = ! empty($data['amount']) ? $data['amount'] : $invitation->invoice->getRequestedAmount();
+
         // check if it's a proposal
         if ($invitation->proposal) {
             $invoice = $invitation->proposal->invoice;
@@ -59,7 +61,7 @@ class TemplateService
             '$invoiceDate' => $account->formatDate($invoice->invoice_date),
             '$contact' => $contact->getDisplayName(),
             '$firstName' => $contact->first_name,
-            '$amount' => $account->formatMoney($data['amount'], $client),
+            '$amount' => $account->formatMoney($amount, $client),
             '$total' => $invoice->present()->amount,
             '$balance' => $invoice->present()->balance,
             '$invoice' => $invoice->invoice_number,
diff --git a/resources/views/invited/custom_gateway.blade.php b/resources/views/invited/custom_gateway.blade.php
new file mode 100644
index 0000000000..7ec6e3f0ef
--- /dev/null
+++ b/resources/views/invited/custom_gateway.blade.php
@@ -0,0 +1,16 @@
+<div class="modal fade" id="custom{{ $number }}GatewayModal" tabindex="-1" role="dialog" aria-labelledby="custom{{ $number }}GatewayModalLabel" aria-hidden="true">
+    <div class="modal-dialog">
+        <div class="modal-content">
+            <div class="modal-header">
+                <button type="button" class="close" data-dismiss="modal" aria-hidden="true">&times;</button>
+                <h4 class="modal-title">{{ $customGateway->getConfigField('name') }}</h4>
+            </div>
+            <div class="panel-body">
+                {!! $customGateway->getCustomHtml($invitation) !!}
+            </div>
+            <div class="modal-footer">
+                <button type="button" class="btn btn-default" data-dismiss="modal">{{ trans('texts.close') }}</button>
+            </div>
+        </div>
+    </div>
+</div>