diff --git a/app/Domains/Event/Views/Partials/SignUpForm/steps/StepSummary.vue b/app/Domains/Event/Views/Partials/SignUpForm/steps/StepSummary.vue
index fb2caae..a7da2a2 100644
--- a/app/Domains/Event/Views/Partials/SignUpForm/steps/StepSummary.vue
+++ b/app/Domains/Event/Views/Partials/SignUpForm/steps/StepSummary.vue
@@ -54,7 +54,7 @@ function eatingHabit() {
             <table class="form-table" style="margin-bottom: 20px;">
                 <tr>
                     <td>Dein Name:</td>
-                    <td>{{props.formData.vorname}} {{props.formData.vorname}}</td>
+                    <td>{{props.formData.vorname}} {{props.formData.nachname}}</td>
                 </tr>
 
                 <tr>
diff --git a/app/Domains/Invoice/Actions/CreateInvoice/CreateInvoiceCommand.php b/app/Domains/Invoice/Actions/CreateInvoice/CreateInvoiceCommand.php
index a922629..ea166b7 100644
--- a/app/Domains/Invoice/Actions/CreateInvoice/CreateInvoiceCommand.php
+++ b/app/Domains/Invoice/Actions/CreateInvoice/CreateInvoiceCommand.php
@@ -4,6 +4,7 @@ namespace App\Domains\Invoice\Actions\CreateInvoice;
 
 use App\Enumerations\InvoiceStatus;
 use App\Mail\InvoiceMails\InvoiceMailsNewInvoiceMail;
+use App\Mail\InvoiceMails\InvoiceMailsSubmittedConfirmationMail;
 use App\Mail\ParticipantParticipationMails\EventSignUpSuccessfullMail;
 use App\Models\Invoice;
 use Illuminate\Support\Facades\Mail;
@@ -50,6 +51,13 @@ class CreateInvoiceCommand {
         if ($invoice !== null) {
             $response->success = true;
             $response->invoice = $invoice;
+
+            if ($invoice->contact_email !== null) {
+                Mail::to($invoice->contact_email)->send(new InvoiceMailsSubmittedConfirmationMail(
+                    invoice: $invoice,
+                    costUnit: $this->request->costUnit,
+                ));
+            }
         }
 
         if ($this->request->costUnit->mail_on_new) {
diff --git a/app/Mail/InvoiceMails/InvoiceMailsSubmittedConfirmationMail.php b/app/Mail/InvoiceMails/InvoiceMailsSubmittedConfirmationMail.php
new file mode 100644
index 0000000..dc206a7
--- /dev/null
+++ b/app/Mail/InvoiceMails/InvoiceMailsSubmittedConfirmationMail.php
@@ -0,0 +1,50 @@
+<?php
+
+namespace App\Mail\InvoiceMails;
+
+use App\Models\CostUnit;
+use App\Models\Invoice;
+use App\ValueObjects\Amount;
+use Illuminate\Mail\Mailable;
+use Illuminate\Mail\Mailables\Attachment;
+use Illuminate\Mail\Mailables\Content;
+use Illuminate\Mail\Mailables\Envelope;
+
+class InvoiceMailsSubmittedConfirmationMail extends Mailable {
+    public function __construct(
+        private Invoice $invoice,
+        private CostUnit $costUnit,
+    )
+    {
+        //
+    }
+
+    public function envelope(): Envelope
+    {
+        return new Envelope(
+            subject: 'Deine Abrechnung wurde erfolgreich eingereicht',
+        );
+    }
+
+    public function content(): Content
+    {
+        return new Content(
+            view: 'emails.invoices.submitted_confirmation',
+            with: [
+                'contactName' => $this->invoice->contact_name,
+                'costUnitName' => $this->costUnit->name,
+                'invoiceAmount' => Amount::fromString($this->invoice->amount)->toString(),
+                'invoiceType' => $this->invoice->invoiceType()->name,
+                'invoiceNumber' => $this->invoice->invoice_number,
+            ],
+        );
+    }
+
+    /**
+     * @return array<int, Attachment>
+     */
+    public function attachments(): array
+    {
+        return [];
+    }
+}
diff --git a/app/Resources/EventResource.php b/app/Resources/EventResource.php
index 632146d..eef36db 100644
--- a/app/Resources/EventResource.php
+++ b/app/Resources/EventResource.php
@@ -331,7 +331,7 @@ class EventResource extends JsonResource{
         $basicFee = $basicFee->multiply($this->getMultiplier());
 
         if ($this->event->pay_per_day) {
-            $days = $arrival->diff($departure)->days;
+            $days = $arrival->diff($departure)->days + 1;
             $basicFee = $basicFee->multiply($days);
         }
 
diff --git a/resources/views/emails/invoices/submitted_confirmation.blade.php b/resources/views/emails/invoices/submitted_confirmation.blade.php
new file mode 100644
index 0000000..d66eb11
--- /dev/null
+++ b/resources/views/emails/invoices/submitted_confirmation.blade.php
@@ -0,0 +1,56 @@
+<!DOCTYPE html>
+<html>
+<body>
+<h1>Hallo {{$contactName}},</h1>
+<p>
+    deine Abrechnung wurde erfolgreich eingereicht.<br />
+    In der nachfolgenden Übersicht findest du die Details zu deiner Abrechnung:
+</p>
+
+
+<table cellpadding="0" cellspacing="0" border="0"
+       style="width: 100%; max-width: 640px; border-collapse: collapse; font-family: Arial, sans-serif; font-size: 14px; color: #1f2937;">
+
+    <tr>
+        <td style="padding: 8px 12px; width: 180px; font-weight: 600; color: #4b5563; border-bottom: 1px solid #e5e7eb;">
+            Abrechnungsnummer:
+        </td>
+        <td style="padding: 8px 12px; border-bottom: 1px solid #e5e7eb;">
+            {{$invoiceNumber}}
+        </td>
+    </tr>
+
+    <tr>
+        <td style="padding: 8px 12px; width: 180px; font-weight: 600; color: #4b5563; border-bottom: 1px solid #e5e7eb;">
+            Veranstaltung / Kostenstelle:
+        </td>
+        <td style="padding: 8px 12px; border-bottom: 1px solid #e5e7eb;">
+            {{$costUnitName}}
+        </td>
+    </tr>
+
+    <tr>
+        <td style="padding: 8px 12px; width: 180px; font-weight: 600; color: #4b5563; border-bottom: 1px solid #e5e7eb;">
+            Betrag:
+        </td>
+        <td style="padding: 8px 12px; border-bottom: 1px solid #e5e7eb;">
+            {{$invoiceAmount}}
+        </td>
+    </tr>
+
+    <tr>
+        <td style="padding: 8px 12px; font-weight: 600; color: #4b5563; border-bottom: 1px solid #e5e7eb;">
+            Grund der Abrechnung:
+        </td>
+        <td style="padding: 8px 12px; border-bottom: 1px solid #e5e7eb;">
+            {{$invoiceType}}
+        </td>
+    </tr>
+</table>
+
+
+<p>
+    Deine Abrechnung wird nun bearbeitet. Du wirst per E-Mail benachrichtigt, sobald sich der Status deiner Abrechnung ändert.
+</p>
+</body>
+</html>