diff --git a/server/vbv_lernwelt/shop/invoice/abacus.py b/server/vbv_lernwelt/shop/invoice/abacus.py
index 059c6e3b..a92b1056 100644
--- a/server/vbv_lernwelt/shop/invoice/abacus.py
+++ b/server/vbv_lernwelt/shop/invoice/abacus.py
@@ -6,6 +6,7 @@ from xml.etree.ElementTree import Element, SubElement, tostring
 
 from vbv_lernwelt.shop.invoice.creator import InvoiceCreator, Item
 from vbv_lernwelt.shop.invoice.repositories import InvoiceRepository
+from vbv_lernwelt.shop.models import CheckoutInformation
 
 
 class AbacusInvoiceCreator(InvoiceCreator):
@@ -14,18 +15,25 @@ class AbacusInvoiceCreator(InvoiceCreator):
 
     def create_invoice(
         self,
-        customer_number: str,
-        purchase_order_date: datetime.date,
-        delivery_date: datetime.date,
-        reference_purchase_order: str,
-        unic_id: str,
-        items: List[Item],
+        checkout_information: CheckoutInformation,
         filename: str = None,
     ):
-        invoice = self.render_invoice(
+        customer_number = checkout_information.transaction_id
+        order_date = checkout_information.created_at.date()
+        reference_purchase_order = str(checkout_information.id)
+        unic_id = checkout_information.transaction_id
+
+        items = [
+            Item(
+                product_number=checkout_information.product_sku,
+                quantity=1,
+                description=checkout_information.product_description,
+            )
+        ]
+
+        invoice = self.invoice_xml(
             customer_number,
-            purchase_order_date,
-            delivery_date,
+            order_date,
             reference_purchase_order,
             unic_id,
             items,
@@ -37,10 +45,9 @@ class AbacusInvoiceCreator(InvoiceCreator):
         self.repository.upload_invoice(invoice, filename)
 
     @staticmethod
-    def render_invoice(
+    def invoice_xml(
         customer_number: str,
-        purchase_order_date: datetime.date,
-        delivery_date: datetime.date,
+        order_date: datetime.date,
         reference_purchase_order: str,
         unic_id: str,
         items: List[Item],
@@ -62,10 +69,10 @@ class AbacusInvoiceCreator(InvoiceCreator):
         SubElement(sales_order_header_fields, "CustomerNumber").text = customer_number
         SubElement(
             sales_order_header_fields, "PurchaseOrderDate"
-        ).text = purchase_order_date.isoformat()
+        ).text = order_date.isoformat()
         SubElement(
             sales_order_header_fields, "DeliveryDate"
-        ).text = delivery_date.isoformat()
+        ).text = order_date.isoformat()
         SubElement(
             sales_order_header_fields, "ReferencePurchaseOrder"
         ).text = reference_purchase_order
@@ -76,7 +83,7 @@ class AbacusInvoiceCreator(InvoiceCreator):
             item_fields = SubElement(item_element, "ItemFields", mode="SAVE")
             SubElement(item_fields, "ItemNumber").text = str(index)
             SubElement(item_fields, "ProductNumber").text = item.product_number
-            SubElement(item_fields, "QuantityOrdered").text = item.quantity
+            SubElement(item_fields, "QuantityOrdered").text = str(item.quantity)
 
             item_text = SubElement(item_element, "ItemText", mode="SAVE")
             item_text_fields = SubElement(item_text, "ItemTextFields", mode="SAVE")
@@ -84,6 +91,52 @@ class AbacusInvoiceCreator(InvoiceCreator):
 
         return AbacusInvoiceCreator.create_xml_string(container)
 
+    @staticmethod
+    def customer_xml(
+        customer_number: str,
+        name: str,
+        first_name: str,
+        address_text: str,
+        street: str,
+        house_number: str,
+        zip_code: str,
+        city: str,
+        country: str,
+        language: str,
+        email: str,
+    ):
+        container = Element("AbaConnectContainer")
+        task = SubElement(container, "Task")
+
+        parameter = SubElement(task, "Parameter")
+        SubElement(parameter, "Application").text = "DEBI"
+        SubElement(parameter, "ID").text = "Kunden"
+        SubElement(parameter, "MapID").text = "AbaDefault"
+        SubElement(parameter, "Version").text = "2022.00"
+
+        transaction = SubElement(task, "Transaction")
+        customer_element = SubElement(transaction, "Customer", mode="SAVE")
+
+        SubElement(customer_element, "CustomerNumber").text = customer_number
+        SubElement(customer_element, "DefaultCurrency").text = "CHF"
+        SubElement(customer_element, "PaymentTermNumber").text = "1"
+        SubElement(customer_element, "ReminderProcedure").text = "NORM"
+
+        address_data = SubElement(customer_element, "AddressData", mode="SAVE")
+        SubElement(address_data, "AddressNumber").text = customer_number
+        SubElement(address_data, "Name").text = name
+        SubElement(address_data, "FirstName").text = first_name
+        SubElement(address_data, "Text").text = address_text
+        SubElement(address_data, "Street").text = street
+        SubElement(address_data, "HouseNumber").text = house_number
+        SubElement(address_data, "ZIP").text = zip_code
+        SubElement(address_data, "City").text = city
+        SubElement(address_data, "Country").text = country
+        SubElement(address_data, "Language").text = language
+        SubElement(address_data, "Email").text = email
+
+        return AbacusInvoiceCreator.create_xml_string(container)
+
     @staticmethod
     def create_xml_string(container: Element, encoding: str = "UTF-8") -> str:
         xml_bytes = tostring(container, encoding)
diff --git a/server/vbv_lernwelt/shop/invoice/creator.py b/server/vbv_lernwelt/shop/invoice/creator.py
index c8758e91..85c08475 100644
--- a/server/vbv_lernwelt/shop/invoice/creator.py
+++ b/server/vbv_lernwelt/shop/invoice/creator.py
@@ -1,13 +1,13 @@
-import datetime
 from abc import ABC, abstractmethod
 from dataclasses import dataclass
-from typing import List
+
+from vbv_lernwelt.shop.models import CheckoutInformation
 
 
 @dataclass
 class Item:
     product_number: str
-    quantity: str
+    quantity: int
     description: str
 
 
@@ -15,11 +15,7 @@ class InvoiceCreator(ABC):
     @abstractmethod
     def create_invoice(
         self,
-        customer_number: str,
-        purchase_order_date: datetime.date,
-        delivery_date: datetime.date,
-        reference_purchase_order: str,
-        unic_id: str,
-        items: List[Item],
+        checkout_information: CheckoutInformation,
+        filename: str = None,
     ):
         pass
diff --git a/server/vbv_lernwelt/shop/invoice/repositories.py b/server/vbv_lernwelt/shop/invoice/repositories.py
index 5f599b22..df231324 100644
--- a/server/vbv_lernwelt/shop/invoice/repositories.py
+++ b/server/vbv_lernwelt/shop/invoice/repositories.py
@@ -1,5 +1,9 @@
 from abc import ABC, abstractmethod
 
+import structlog
+
+logger = structlog.get_logger(__name__)
+
 
 class InvoiceRepository(ABC):
     @abstractmethod
@@ -35,6 +39,6 @@ class SFTPInvoiceRepository(InvoiceRepository):
                 sftp_client.putfo(invoice_io, f"uploads/{filename}")
 
         except Exception as e:
-            print(f"An error occurred: {e}")
+            logger.error("Could not upload invoice", exc_info=e)
         finally:
             ssh_client.close()
diff --git a/server/vbv_lernwelt/shop/tests/test_invoice.py b/server/vbv_lernwelt/shop/tests/test_invoice.py
index ffc4936f..538aeaf3 100644
--- a/server/vbv_lernwelt/shop/tests/test_invoice.py
+++ b/server/vbv_lernwelt/shop/tests/test_invoice.py
@@ -1,71 +1,86 @@
 from datetime import date
 from unittest.mock import create_autospec
 
+from django.test import TestCase
+
+from vbv_lernwelt.core.admin import User
 from vbv_lernwelt.shop.invoice.abacus import AbacusInvoiceCreator
 from vbv_lernwelt.shop.invoice.creator import Item
 from vbv_lernwelt.shop.invoice.repositories import InvoiceRepository
+from vbv_lernwelt.shop.models import CheckoutInformation
+
+USER_USERNAME = "testuser"
+USER_EMAIL = "test@example.com"
+USER_PASSWORD = "testpassword"
 
 
-def test_render_invoice():
-    # GIVEN
-    creator = AbacusInvoiceCreator(repository=create_autospec(InvoiceRepository))
-    items = [Item(product_number="001", quantity="10", description="Test Item")]
-    customer_number = "12345"
-    purchase_order_date = date(2023, 1, 1)
-    delivery_date = date(2023, 1, 10)
-    reference_purchase_order = "PO12345678"
-    unic_id = "UNIC001"
+class InvoiceTestCase(TestCase):
+    def setUp(self) -> None:
+        self.user = User.objects.create_user(
+            username=USER_USERNAME,
+            email=USER_EMAIL,
+            password=USER_PASSWORD,
+            is_active=True,
+        )
 
-    # WHEN
-    invoice_xml = creator.render_invoice(
-        customer_number,
-        purchase_order_date,
-        delivery_date,
-        reference_purchase_order,
-        unic_id,
-        items,
-    )
+    def test_render_invoice(self):
+        # GIVEN
+        creator = AbacusInvoiceCreator(repository=create_autospec(InvoiceRepository))
+        items = [Item(product_number="001", quantity=1, description="Test Item")]
+        customer_number = "12345"
+        order_date = date(2023, 1, 1)
+        reference_purchase_order = "PO12345678"
+        unic_id = "UNIC001"
 
-    # THEN
-    assert "<CustomerNumber>12345</CustomerNumber>" in invoice_xml
-    assert "<ItemNumber>1</ItemNumber>" in invoice_xml
-    assert "<ProductNumber>001</ProductNumber>" in invoice_xml
-    assert "<QuantityOrdered>10</QuantityOrdered>" in invoice_xml
-    assert "<Text>Test Item</Text>" in invoice_xml
+        # WHEN
+        invoice_xml = creator.invoice_xml(
+            customer_number,
+            order_date,
+            reference_purchase_order,
+            unic_id,
+            items,
+        )
 
+        # THEN
+        assert "<CustomerNumber>12345</CustomerNumber>" in invoice_xml
+        assert "<ItemNumber>1</ItemNumber>" in invoice_xml
+        assert "<ProductNumber>001</ProductNumber>" in invoice_xml
+        assert "<QuantityOrdered>1</QuantityOrdered>" in invoice_xml
+        assert "<Text>Test Item</Text>" in invoice_xml
 
-def test_create_invoice_calls_upload():
-    # GIVEN
-    repository_mock = create_autospec(InvoiceRepository)
+    def test_create_invoice_calls_upload(self):
+        # GIVEN
+        repository_mock = create_autospec(InvoiceRepository)
 
-    creator = AbacusInvoiceCreator(repository=repository_mock)
-    items = [Item(product_number="001", quantity="10", description="Test Item")]
-    customer_number = "12345"
-    purchase_order_date = date(2023, 1, 1)
-    delivery_date = date(2023, 1, 10)
-    reference_purchase_order = "PO12345678"
-    unic_id = "UNIC001"
+        creator = AbacusInvoiceCreator(repository=repository_mock)
 
-    expected_filename = "test.xml"
+        expected_filename = "test.xml"
 
-    # WHEN
-    creator.create_invoice(
-        customer_number,
-        purchase_order_date,
-        delivery_date,
-        reference_purchase_order,
-        unic_id,
-        items,
-        filename=expected_filename,
-    )
+        checkout_information = CheckoutInformation.objects.create(
+            user=self.user,
+            transaction_id="12345",
+            product_sku="001",
+            product_name="Test Product",
+            product_description="Test Product Description",
+            product_price=1000,
+            state="initialized",
+        )
 
-    # THEN
-    repository_mock.upload_invoice.assert_called_once()
-    uploaded_invoice, uploaded_filename = repository_mock.upload_invoice.call_args[0]
+        # WHEN
+        creator.create_invoice(
+            checkout_information=checkout_information,
+            filename=expected_filename,
+        )
 
-    assert uploaded_filename == expected_filename
-    assert "<CustomerNumber>12345</CustomerNumber>" in uploaded_invoice
-    assert "<ItemNumber>1</ItemNumber>" in uploaded_invoice
-    assert "<ProductNumber>001</ProductNumber>" in uploaded_invoice
-    assert "<QuantityOrdered>10</QuantityOrdered>" in uploaded_invoice
-    assert "<Text>Test Item</Text>" in uploaded_invoice
+        # THEN
+        repository_mock.upload_invoice.assert_called_once()
+        uploaded_invoice, uploaded_filename = repository_mock.upload_invoice.call_args[
+            0
+        ]
+
+        assert uploaded_filename == expected_filename
+        assert "<CustomerNumber>12345</CustomerNumber>" in uploaded_invoice
+        assert "<ItemNumber>1</ItemNumber>" in uploaded_invoice
+        assert "<ProductNumber>001</ProductNumber>" in uploaded_invoice
+        assert "<QuantityOrdered>1</QuantityOrdered>" in uploaded_invoice
+        assert "<Text>Test Product Description</Text>" in uploaded_invoice