diff --git a/CHANGELOG.md b/CHANGELOG.md
index a7284a9..b314e7a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Release Notes - heidelpay Payment Gateway for WooCommerce
 
+## 1.5.0
+
+### Added:
+- Payment method: Invoice
+### Fixed: 
+- Date input for secured invoice not working on Safari browser.
+
 ## 1.4.0
 
 ### Added:
diff --git a/assets/css/datepicker.css b/assets/css/datepicker.css
new file mode 100644
index 0000000..a322e79
--- /dev/null
+++ b/assets/css/datepicker.css
@@ -0,0 +1,31 @@
+.ui-datepicker {
+    background: #fff;
+    font-size:11px;
+    padding:10px;
+    border:1px solid #ccc;
+}
+
+.ui-datepicker table {
+    width:278px;
+}
+
+.ui-datepicker table td {
+    text-align:center;
+}
+
+.ui-datepicker a {
+    cursor:pointer;
+    text-decoration:none;
+}
+
+.ui-datepicker-prev {
+}
+
+.ui-datepicker-next {
+    float:right;
+}
+
+.ui-datepicker-title {
+    text-align: center;
+    font-weight:bold;
+}
diff --git a/assets/js/securedInvoice.js b/assets/js/securedInvoice.js
index f0a744e..5596369 100644
--- a/assets/js/securedInvoice.js
+++ b/assets/js/securedInvoice.js
@@ -20,5 +20,13 @@ jQuery(function () {
             jQuery('li.payment_method_hp_ivpg').show();
         }
         ;
+
+        var date_input = document.getElementById("hp_date");
+
+        date_input.reportValidity = function() {
+            var inputDate = this.valueAsDate;
+            var currentDate = new Date();
+            return new Date(currentDate-inputDate).getFullYear() - new Date(0).getFullYear() < 18
+        };
     });
 });
\ No newline at end of file
diff --git a/includes/abstracts/abstract-wc-heidelpay-payment-gateway.php b/includes/abstracts/abstract-wc-heidelpay-payment-gateway.php
index 1080b67..0dd7152 100644
--- a/includes/abstracts/abstract-wc-heidelpay-payment-gateway.php
+++ b/includes/abstracts/abstract-wc-heidelpay-payment-gateway.php
@@ -114,14 +114,14 @@ public function init_form_fields()
                 'type' => 'text',
                 'id' => $this->id . '_security_sender',
                 'description' => 'Security Sender',
-                'default' => ''
+                'default' => '31HA07BC8142C5A171745D00AD63D182'
             ),
             'user_login' => array(
                 'title' => __('User Login', 'woocommerce-heidelpay'),
                 'type' => 'text',
                 'id' => $this->id . '_user_login',
                 'description' => 'User Login',
-                'default' => ''
+                'default' => '31ha07bc8142c5a171744e5aef11ffd3'
             ),
             'user_password' => array(
                 'title' => __('User Password', 'woocommerce-heidelpay'),
@@ -332,13 +332,19 @@ protected function setCriterions()
      * Send payment request.
      * Validation happens before this in the checkoutValidation() function.
      *
+     * @param $order
+     * @param null $uid
      * @return mixed
-     * @throws \Heidelpay\PhpPaymentApi\Exceptions\PaymentFormUrlException
      */
-    public function performRequest($order, $uid)
+    public function performRequest($order, $uid = null)
     {
         if (!empty($_POST)) {
-            $this->handleFormPost($_POST);
+            try{
+                $this->handleFormPost($_POST);
+            } catch (\Exception $e) {
+                wc_get_logger()->log(WC_Log_Levels::DEBUG, htmlspecialchars(print_r($e->getMessage(), 1)));
+                return null;
+            }
         }
 
         if (!empty($this->bookingAction) && method_exists($this->payMethod, $this->bookingAction)) {
@@ -529,9 +535,12 @@ public function setAvailability($available_gateways)
      */
     public function addPayInfo($orderReceivedText)
     {
+        /**
+         * @var WC_Order $order
+         */
         $order = $this->getOrderFromKey();
 
-        if ($order === null || $order->get_payment_method() !== $this->id) {
+        if (!$order instanceof WC_Order || $order->get_payment_method() !== $this->id) {
             return $orderReceivedText;
         }
 
diff --git a/includes/gateways/class-wc-heidelpay-gateway-dd.php b/includes/gateways/class-wc-heidelpay-gateway-dd.php
index 089adf2..df58ea2 100644
--- a/includes/gateways/class-wc-heidelpay-gateway-dd.php
+++ b/includes/gateways/class-wc-heidelpay-gateway-dd.php
@@ -103,7 +103,7 @@ public function payment_fields()
         $accountHolderLabel = __('Account Holder', 'woocommerce-heidelpay');
         $accountIbanLabel = __('IBAN', 'woocommerce-heidelpay');
 
-        $accountHolder = wc()->customer->get_billing_first_name() . ' ' . wc()->customer->get_last_name();
+        $accountHolder = wc()->customer->get_billing_first_name() . ' ' . wc()->customer->get_billing_last_name();
 
         echo '<div>';
 
diff --git a/includes/gateways/class-wc-heidelpay-gateway-iv.php b/includes/gateways/class-wc-heidelpay-gateway-iv.php
new file mode 100644
index 0000000..a6ab632
--- /dev/null
+++ b/includes/gateways/class-wc-heidelpay-gateway-iv.php
@@ -0,0 +1,67 @@
+<?php
+
+/**
+ * Invoice
+ *
+ * WooCommerce payment gateway for Invoice
+ *
+ * @license Use of this software requires acceptance of the Evaluation License Agreement. See LICENSE file.
+ * @copyright Copyright © 2018-present heidelpay GmbH. All rights reserved.
+ *
+ * @link  http://dev.heidelpay.com/
+ *
+ * @author  Florian Evertz
+ *
+ * @package  woocommerce-heidelpay
+ * @category WooCommerce
+ */
+
+if (!defined('ABSPATH')){
+    exit; // Exit if accessed directly
+}
+
+require_once WC_HEIDELPAY_PLUGIN_PATH . DIRECTORY_SEPARATOR . 'includes' . DIRECTORY_SEPARATOR . 'abstracts' .
+    DIRECTORY_SEPARATOR . 'abstract-wc-heidelpay-payment-gateway.php';
+
+use Heidelpay\PhpPaymentApi\PaymentMethods\InvoicePaymentMethod;
+
+class WC_Gateway_HP_IV extends WC_Heidelpay_Payment_Gateway
+{
+    public function init_form_fields()
+    {
+        parent::init_form_fields();
+
+        $this->form_fields['description']['default'] = sprintf(
+            __('Insert payment data for %s', 'woocommerce-heidelpay'),
+            $this->name
+        );
+        $this->form_fields['instructions']['default'] = __(
+            'please send the money to IBAN BIC ',
+            'woocommerce-heidelpay'
+        );
+        $this->form_fields['transaction_channel']['default'] = '31HA07BC8142C5A171749A60D979B6E4';
+
+        $this->form_fields['send_payment_info'] = array(
+            'title' => __('Payment information mail', 'woocommerce-heidelpay'),
+            'type' => 'checkbox',
+            'description' => __(
+                'Add payment information to e-mail',
+                'woocommerce-heidelpay'
+            ),
+            'default' => 'yes',
+            'desc_tip' => true,
+        );
+    }
+
+    /**
+     * Set the id and PaymentMethod
+     */
+    protected function setPayMethod()
+    {
+        $this->payMethod = new InvoicePaymentMethod();
+        $this->id = 'hp_iv';
+        $this->name = __('Invoice', 'woocommerce-heidelpay');
+        $this->has_fields = false;
+        $this->bookingAction = 'authorize';
+    }
+}
diff --git a/includes/gateways/class-wc-heidelpay-gateway-ivpg.php b/includes/gateways/class-wc-heidelpay-gateway-ivpg.php
index 6daea0d..48742b9 100644
--- a/includes/gateways/class-wc-heidelpay-gateway-ivpg.php
+++ b/includes/gateways/class-wc-heidelpay-gateway-ivpg.php
@@ -222,6 +222,17 @@ public function payment_fields()
         $salutationMText = __('Mr', 'woocommerce-heidelpay');
         $salutationWText = __('Mrs', 'woocommerce-heidelpay');
         $birthdateText = __('Birthdate', 'woocommerce-heidelpay');
+        $dateFormatPlaceholder = __('datePlaceholder', 'woocommerce-heidelpay');
+        $dateFormat = __('dateFormat', 'woocommerce-heidelpay');
+
+        wp_enqueue_script('jquery');
+        wp_enqueue_script('jquery-ui-core');
+        wp_enqueue_script('jquery-ui-datepicker');
+        wp_enqueue_style(
+            'jquery-ui-css',
+            WC_HEIDELPAY_PLUGIN_URL . '/assets/css/datepicker.css'
+        );
+
 
         echo '<div>';
 
@@ -234,33 +245,34 @@ public function payment_fields()
             '</select>' .
             '<br/>' .
             '<label for="hp_date">' . $birthdateText . ':</label>' .
-            '<input type="date" name="birthdate" id="hp_date" value="" class="form-row-wide validate-required"/>' .
+            '<input type="date" name="birthdate" id="hp_date" value="" class="form-row-wide validate-required" 
+            placeholder="' . $dateFormatPlaceholder . '"/>' .
             '<br/>';
-
         echo '</div>';
-        echo '<script>
-                var date_input = document.getElementById("hp_date");
-                
-                date_input.reportValidity = function() {
-                    var inputDate = this.valueAsDate;
-                    var currentDate = new Date();
-                    if(new Date(currentDate-inputDate).getFullYear() - new Date(0).getFullYear() < 18){
-                        return false;
+        echo '<script type="text/javascript">
+                    if ( jQuery(\'[type="date"]\').prop(\'type\') != \'date\' ) {
+                                    jQuery(document).ready(function(){
+                                        jQuery(\'#hp_date\').datepicker({
+                                            dateFormat: \'' . $dateFormat . '\',
+                                            changeYear: true,
+                                            changeMonth: true,
+                                            yearRange: \'-100:-18\',
+                                            defaultDate: "-17y -364d"
+                                        });
+                                    });
                     }
-                    return true;
-                };
-                
-                date_input.onchange = function () {
-                    if(!this.reportValidity() && jQuery("ul[class=woocommerce-error]")[0] == undefined){
-                        jQuery("form[name=checkout]").prepend(\'' . $this->ErrorHtml() . '\');
-                        jQuery("ul[class=woocommerce-error]")[0].scrollIntoView({behavior : "smooth"})
-                    }else{
-                        if(this.reportValidity() && jQuery("ul[class=woocommerce-error]")[0] !== undefined){
-                            jQuery("ul[class=woocommerce-error]").remove();
+                    
+                    date_input.onchange = function () {
+                        if(!this.reportValidity() && jQuery("ul[class=woocommerce-error]")[0] == undefined){
+                            jQuery("form[name=checkout]").prepend(\'' . $this->ErrorHtml() . '\');
+                            jQuery("ul[class=woocommerce-error]")[0].scrollIntoView({behavior : "smooth"})
+                        }else{
+                            if(this.reportValidity() && jQuery("ul[class=woocommerce-error]")[0] !== undefined){
+                                jQuery("ul[class=woocommerce-error]").remove();
                         }
                     }
                 };
-              </script>';
+</script>';
     }
 
     public function ErrorHtml()
@@ -286,12 +298,24 @@ protected function setPayMethod()
         $this->bookingAction = 'authorize';
     }
 
+
+    /**
+     * @throws Exception
+     */
     protected function handleFormPost()
     {
         parent::handleFormPost();
 
         if (!empty($_POST['salutation']) && !empty($_POST['birthdate'])) {
-            $this->payMethod->getRequest()->b2cSecured($_POST['salutation'], $_POST['birthdate']);
+            $input = $_POST;
+            try {
+                $date = new DateTime(htmlspecialchars($input['birthdate']));
+            } catch (\Exception $exception) {
+                wc_add_notice(__('Birthdate', 'woocommerce-heidelpay') . ': '
+                    . __('invalid date format', 'woocommerce-heidelpay'), 'error');
+                throw $exception;
+            }
+            $this->payMethod->getRequest()->b2cSecured(htmlspecialchars($input['salutation']), $date->format('Y-m-d'));
         }
     }
 }
diff --git a/languages/woocommerce-heidelpay-de_DE.mo b/languages/woocommerce-heidelpay-de_DE.mo
index da6920b..3dff71f 100644
Binary files a/languages/woocommerce-heidelpay-de_DE.mo and b/languages/woocommerce-heidelpay-de_DE.mo differ
diff --git a/languages/woocommerce-heidelpay-de_DE.po b/languages/woocommerce-heidelpay-de_DE.po
index 2118f91..259684b 100644
--- a/languages/woocommerce-heidelpay-de_DE.po
+++ b/languages/woocommerce-heidelpay-de_DE.po
@@ -36,6 +36,15 @@ msgstr "Der Betrag von <strong>{AMOUNT} {CURRENCY}</strong> wird in den n&auml;c
         			"<br />"
         			"Bitte sorgen Sie f&uuml;r ausreichende Deckung auf dem entsprechenden Konto."
 
+msgid "datePlaceholder"
+msgstr "tt.mm.jjjj"
+
+msgid "dateFormat"
+msgstr "dd.mm.yy"
+
+msgid "invalid date format"
+msgstr "Ungültiges Datumsformat."
+
 #: includes/abstracts/abstract-wc-heidelpay-iframe-gateway.php:57
 msgid "Awaiting payment"
 msgstr "Auf Zahlung warten"
diff --git a/languages/woocommerce-heidelpay-en_US.mo b/languages/woocommerce-heidelpay-en_US.mo
index 9d3bbe7..3faa913 100644
Binary files a/languages/woocommerce-heidelpay-en_US.mo and b/languages/woocommerce-heidelpay-en_US.mo differ
diff --git a/languages/woocommerce-heidelpay-en_US.po b/languages/woocommerce-heidelpay-en_US.po
index 7cf39f6..9b2fac9 100644
--- a/languages/woocommerce-heidelpay-en_US.po
+++ b/languages/woocommerce-heidelpay-en_US.po
@@ -20,3 +20,12 @@ msgstr "The amount of <strong>{AMOUNT} {CURRENCY}</strong> will be debited from
         		"and the creditor identifier: {CreditorId}</i><br />"
         		"<br />"
         		"Please ensure that there will be sufficient funds on the corresponding account."
+
+msgid "datePlaceholder"
+msgstr "yyyy-mm-dd"
+
+msgid "dateFormat"
+msgstr "yy-mm-dd"
+
+msgid "invalid date format"
+msgstr "Invalid date format."
\ No newline at end of file
diff --git a/woocommerce-heidelpay.php b/woocommerce-heidelpay.php
index 6edfe6b..f66d3cc 100644
--- a/woocommerce-heidelpay.php
+++ b/woocommerce-heidelpay.php
@@ -10,7 +10,7 @@
  * Plugin Name: heidelpay WooCommerce
  * Plugin URI: https://dev.heidelpay.com
  * Description: heidelpay payment integration for WooCommerce
- * Version: 1.4.0
+ * Version: 1.5.0
  * Author: heidelpay
  * Author URI: htts://www.heidelpay.com
  * Developer: heidelpay
@@ -29,7 +29,7 @@
     /**
      * Required minimums and constants
      */
-    define('WC_HEIDELPAY_VERSION', '1.4.0');
+    define('WC_HEIDELPAY_VERSION', '1.5.0');
     define('WC_HEIDELPAY_MIN_PHP_VER', '5.6.0');
     define('WC_HEIDELPAY_MIN_WC_VER', '3.0.0');
     define('WC_HEIDELPAY_MAIN_FILE', __FILE__);
@@ -134,6 +134,7 @@ public function init()
                 require_once __DIR__ . '/includes/gateways/class-wc-heidelpay-gateway-idl.php';
                 require_once __DIR__ . '/includes/gateways/class-wc-heidelpay-gateway-dd.php';
                 require_once __DIR__ . '/includes/gateways/class-wc-heidelpay-gateway-gp.php';
+                require_once __DIR__ . '/includes/gateways/class-wc-heidelpay-gateway-iv.php';
                 require_once __DIR__ . '/includes/gateways/class-wc-heidelpay-gateway-ivpg.php';
                 require_once __DIR__ . '/includes/gateways/class-wc-heidelpay-gateway-so.php';
                 require_once __DIR__ . '/includes/gateways/class-wc-heidelpay-gateway-va.php';
@@ -155,6 +156,7 @@ public function add_gateways($methods)
                 $methods[] = 'WC_Gateway_HP_IDL';
                 $methods[] = 'WC_Gateway_HP_DD';
                 $methods[] = 'WC_Gateway_HP_GP';
+                $methods[] = 'WC_Gateway_HP_IV';
                 $methods[] = 'WC_Gateway_HP_IVPG';
                 $methods[] = 'WC_Gateway_HP_SO';
                 $methods[] = 'WC_Gateway_HP_VA';