diff --git a/README.md b/README.md
index d406c900..7dd29da7 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,9 @@ App to hold regional code for Germany, built on top of ERPNext.
 
 - Validation of EU VAT IDs
 
-   ![Validate EU VAT ID](docs/validate_vat_id.gif)
+    Automatically checks the validity of EU VAT IDs of all your customers every three months, or manually whenever you want.
+
+   ![Validate EU VAT ID](docs/vat_check.png)
 
 ### HR
 
diff --git a/docs/validate_vat_id.gif b/docs/validate_vat_id.gif
deleted file mode 100644
index 278ac712..00000000
Binary files a/docs/validate_vat_id.gif and /dev/null differ
diff --git a/docs/vat_check.png b/docs/vat_check.png
new file mode 100644
index 00000000..e2a5c889
Binary files /dev/null and b/docs/vat_check.png differ
diff --git a/erpnext_germany/api.py b/erpnext_germany/api.py
index eb07091f..61535d58 100644
--- a/erpnext_germany/api.py
+++ b/erpnext_germany/api.py
@@ -1,20 +1,21 @@
 import frappe
+from .utils.eu_vat import check_vat, parse_vat_id
 
 
 @frappe.whitelist()
 def validate_vat_id(vat_id: str) -> bool:
 	"""Use the EU VAT checker to validate a VAT ID."""
-	from .utils.eu_vat import is_valid_eu_vat_id
-
-	result = frappe.cache().hget("eu_vat_validation", vat_id, shared=True)
-	if result is not None:
-		return result
+	is_valid = frappe.cache().hget("eu_vat_validation", vat_id, shared=True)
+	if is_valid is not None:
+		return is_valid
 
 	try:
-		result = is_valid_eu_vat_id(vat_id)
-		frappe.cache().hset("eu_vat_validation", vat_id, result, shared=True)
+		country_code, vat_number = parse_vat_id(vat_id)
+		result = check_vat(country_code, vat_number)
+		is_valid = result.valid
+		frappe.cache().hset("eu_vat_validation", vat_id, is_valid, shared=True)
 	except Exception:
 		frappe.response["status_code"] = 501
-		result = None
+		is_valid = None
 
-	return result
+	return is_valid
diff --git a/erpnext_germany/erpnext_germany/doctype/vat_id_check/__init__.py b/erpnext_germany/erpnext_germany/doctype/vat_id_check/__init__.py
new file mode 100644
index 00000000..e69de29b
diff --git a/erpnext_germany/erpnext_germany/doctype/vat_id_check/test_vat_id_check.py b/erpnext_germany/erpnext_germany/doctype/vat_id_check/test_vat_id_check.py
new file mode 100644
index 00000000..a5b4e4a5
--- /dev/null
+++ b/erpnext_germany/erpnext_germany/doctype/vat_id_check/test_vat_id_check.py
@@ -0,0 +1,9 @@
+# Copyright (c) 2023, ALYF GmbH and Contributors
+# See license.txt
+
+# import frappe
+from frappe.tests.utils import FrappeTestCase
+
+
+class TestVATIDCheck(FrappeTestCase):
+	pass
diff --git a/erpnext_germany/erpnext_germany/doctype/vat_id_check/vat_id_check.js b/erpnext_germany/erpnext_germany/doctype/vat_id_check/vat_id_check.js
new file mode 100644
index 00000000..1c272d65
--- /dev/null
+++ b/erpnext_germany/erpnext_germany/doctype/vat_id_check/vat_id_check.js
@@ -0,0 +1,8 @@
+// Copyright (c) 2023, ALYF GmbH and contributors
+// For license information, please see license.txt
+
+frappe.ui.form.on('VAT ID Check', {
+	// refresh: function(frm) {
+
+	// }
+});
diff --git a/erpnext_germany/erpnext_germany/doctype/vat_id_check/vat_id_check.json b/erpnext_germany/erpnext_germany/doctype/vat_id_check/vat_id_check.json
new file mode 100644
index 00000000..242c1645
--- /dev/null
+++ b/erpnext_germany/erpnext_germany/doctype/vat_id_check/vat_id_check.json
@@ -0,0 +1,270 @@
+{
+ "actions": [],
+ "creation": "2023-03-26 18:28:14.770174",
+ "default_view": "List",
+ "doctype": "DocType",
+ "editable_grid": 1,
+ "engine": "InnoDB",
+ "field_order": [
+  "customer",
+  "customer_vat_id",
+  "customer_address",
+  "column_break_hmgxr",
+  "status",
+  "section_break_6ctcl",
+  "trader_name",
+  "trader_street",
+  "trader_postcode",
+  "trader_city",
+  "column_break_cxvts",
+  "trader_name_match",
+  "trader_street_match",
+  "trader_postcode_match",
+  "trader_city_match",
+  "column_break_cjvyk",
+  "actual_trader_name",
+  "actual_trader_address",
+  "section_break_xljfy",
+  "company",
+  "column_break_scjlu",
+  "requester_vat_id",
+  "section_break_dowxn",
+  "is_valid",
+  "request_id"
+ ],
+ "fields": [
+  {
+   "fieldname": "customer",
+   "fieldtype": "Link",
+   "in_standard_filter": 1,
+   "label": "Customer",
+   "options": "Customer",
+   "set_only_once": 1
+  },
+  {
+   "fieldname": "column_break_hmgxr",
+   "fieldtype": "Column Break"
+  },
+  {
+   "fieldname": "request_id",
+   "fieldtype": "Data",
+   "in_list_view": 1,
+   "label": "Request ID",
+   "no_copy": 1,
+   "read_only": 1
+  },
+  {
+   "default": "0",
+   "fieldname": "is_valid",
+   "fieldtype": "Check",
+   "label": "Is Valid",
+   "no_copy": 1,
+   "read_only": 1
+  },
+  {
+   "fieldname": "company",
+   "fieldtype": "Link",
+   "label": "Company",
+   "options": "Company",
+   "set_only_once": 1
+  },
+  {
+   "fieldname": "section_break_xljfy",
+   "fieldtype": "Section Break",
+   "label": "Requester"
+  },
+  {
+   "fieldname": "column_break_scjlu",
+   "fieldtype": "Column Break"
+  },
+  {
+   "depends_on": "eval:!doc.__islocal",
+   "fieldname": "section_break_dowxn",
+   "fieldtype": "Section Break",
+   "label": "Result"
+  },
+  {
+   "fetch_from": "customer.tax_id",
+   "fetch_if_empty": 1,
+   "fieldname": "customer_vat_id",
+   "fieldtype": "Data",
+   "in_list_view": 1,
+   "in_standard_filter": 1,
+   "label": "Customer VAT ID",
+   "reqd": 1,
+   "set_only_once": 1
+  },
+  {
+   "fetch_from": "company.tax_id",
+   "fetch_if_empty": 1,
+   "fieldname": "requester_vat_id",
+   "fieldtype": "Data",
+   "label": "Requester VAT ID",
+   "set_only_once": 1
+  },
+  {
+   "default": "Planned",
+   "fieldname": "status",
+   "fieldtype": "Select",
+   "label": "Status",
+   "options": "Planned\nRunning\nCompleted\nService Unavailable\nInvalid Input\nError",
+   "read_only": 1
+  },
+  {
+   "fieldname": "customer_address",
+   "fieldtype": "Link",
+   "label": "Customer Address",
+   "options": "Address",
+   "set_only_once": 1
+  },
+  {
+   "fetch_from": "customer.customer_name",
+   "fetch_if_empty": 1,
+   "fieldname": "trader_name",
+   "fieldtype": "Data",
+   "in_list_view": 1,
+   "label": "Trader Name",
+   "set_only_once": 1
+  },
+  {
+   "fetch_from": "customer_address.address_line1",
+   "fetch_if_empty": 1,
+   "fieldname": "trader_street",
+   "fieldtype": "Data",
+   "label": "Trader Street",
+   "set_only_once": 1
+  },
+  {
+   "fetch_from": "customer_address.pincode",
+   "fetch_if_empty": 1,
+   "fieldname": "trader_postcode",
+   "fieldtype": "Data",
+   "label": "Trader Postcode",
+   "set_only_once": 1
+  },
+  {
+   "fetch_from": "customer_address.city",
+   "fetch_if_empty": 1,
+   "fieldname": "trader_city",
+   "fieldtype": "Data",
+   "label": "Trader City",
+   "set_only_once": 1
+  },
+  {
+   "default": "0",
+   "fieldname": "trader_name_match",
+   "fieldtype": "Check",
+   "label": "Trader Name Match",
+   "no_copy": 1,
+   "read_only": 1
+  },
+  {
+   "default": "0",
+   "fieldname": "trader_street_match",
+   "fieldtype": "Check",
+   "label": "Trader Street Match",
+   "no_copy": 1,
+   "read_only": 1
+  },
+  {
+   "default": "0",
+   "fieldname": "trader_postcode_match",
+   "fieldtype": "Check",
+   "label": "Trader Postcode Match",
+   "no_copy": 1,
+   "read_only": 1
+  },
+  {
+   "default": "0",
+   "fieldname": "trader_city_match",
+   "fieldtype": "Check",
+   "label": "Trader City Match",
+   "no_copy": 1,
+   "read_only": 1
+  },
+  {
+   "fieldname": "actual_trader_name",
+   "fieldtype": "Data",
+   "label": "Actual Trader Name",
+   "no_copy": 1,
+   "read_only": 1
+  },
+  {
+   "fieldname": "actual_trader_address",
+   "fieldtype": "Small Text",
+   "label": "Actual Trader Address",
+   "no_copy": 1,
+   "read_only": 1
+  },
+  {
+   "fieldname": "section_break_6ctcl",
+   "fieldtype": "Section Break"
+  },
+  {
+   "fieldname": "column_break_cxvts",
+   "fieldtype": "Column Break"
+  },
+  {
+   "fieldname": "column_break_cjvyk",
+   "fieldtype": "Column Break"
+  }
+ ],
+ "links": [],
+ "modified": "2023-07-14 19:27:17.103880",
+ "modified_by": "Administrator",
+ "module": "ERPNext Germany",
+ "name": "VAT ID Check",
+ "owner": "Administrator",
+ "permissions": [
+  {
+   "create": 1,
+   "delete": 1,
+   "email": 1,
+   "export": 1,
+   "print": 1,
+   "read": 1,
+   "report": 1,
+   "role": "System Manager",
+   "share": 1,
+   "write": 1
+  },
+  {
+   "create": 1,
+   "delete": 1,
+   "email": 1,
+   "export": 1,
+   "print": 1,
+   "read": 1,
+   "report": 1,
+   "role": "Sales Manager",
+   "share": 1,
+   "write": 1
+  },
+  {
+   "create": 1,
+   "delete": 1,
+   "email": 1,
+   "export": 1,
+   "print": 1,
+   "read": 1,
+   "report": 1,
+   "role": "Sales Master Manager",
+   "share": 1,
+   "write": 1
+  },
+  {
+   "create": 1,
+   "email": 1,
+   "export": 1,
+   "print": 1,
+   "read": 1,
+   "report": 1,
+   "role": "Sales User",
+   "write": 1
+  }
+ ],
+ "sort_field": "creation",
+ "sort_order": "DESC",
+ "states": [],
+ "title_field": "customer_vat_id"
+}
\ No newline at end of file
diff --git a/erpnext_germany/erpnext_germany/doctype/vat_id_check/vat_id_check.py b/erpnext_germany/erpnext_germany/doctype/vat_id_check/vat_id_check.py
new file mode 100644
index 00000000..17822f81
--- /dev/null
+++ b/erpnext_germany/erpnext_germany/doctype/vat_id_check/vat_id_check.py
@@ -0,0 +1,83 @@
+# Copyright (c) 2023, ALYF GmbH and contributors
+# For license information, please see license.txt
+
+import frappe
+from frappe.model.document import Document
+from erpnext_germany.utils.eu_vat import check_vat_approx, parse_vat_id
+
+from tenacity import RetryError
+
+
+class VATIDCheck(Document):
+	def before_insert(self):
+		if self.requester_vat_id:
+			requester_country_code, requester_vat_number = parse_vat_id(
+				self.requester_vat_id
+			)
+			self.requester_vat_id = f"{requester_country_code}{requester_vat_number}"
+
+		country_code, vat_number = parse_vat_id(self.customer_vat_id)
+		self.customer_vat_id = f"{country_code}{vat_number}"
+
+	def after_insert(self):
+		frappe.enqueue(
+			run_check,
+			doc=self,
+			queue="long",
+			now=frappe.conf.developer_mode or frappe.flags.in_test,
+		)
+
+
+def run_check(doc: VATIDCheck):
+	doc.db_set("status", "Running", notify=True)
+	requester_country_code, requester_vat_number = None, None
+	if doc.requester_vat_id:
+		try:
+			requester_country_code, requester_vat_number = parse_vat_id(doc.requester_vat_id)
+		except ValueError:
+			doc.db_set({"status": "Invalid Input", "is_valid": False}, notify=True)
+			return
+
+	try:
+		country_code, vat_number = parse_vat_id(doc.customer_vat_id)
+	except ValueError:
+		doc.db_set({"status": "Invalid Input", "is_valid": False}, notify=True)
+		return
+
+	try:
+		result = check_vat_approx(
+			country_code=country_code,
+			vat_number=vat_number,
+			trader_name=doc.trader_name,
+			trader_street=doc.trader_street,
+			trader_postcode=doc.trader_postcode,
+			trader_city=doc.trader_city,
+			requester_country_code=requester_country_code,
+			requester_vat_number=requester_vat_number
+		)
+	except RetryError:
+		doc.db_set("status", "Service Unavailable", notify=True)
+		return
+	except Exception as e:
+		if e.message.upper() == "INVALID_INPUT":
+			doc.db_set({"status": "Invalid Input", "is_valid": False}, notify=True)
+		else:
+			doc.db_set({"status": "Error"}, notify=True)
+			frappe.log_error("VAT ID Check Error", frappe.get_traceback())
+
+		return
+
+	doc.db_set(
+		{
+			"status": "Completed",
+			"is_valid": result.valid,
+			"trader_name_match": bool(result.traderNameMatch),
+			"trader_street_match": bool(result.traderStreetMatch),
+			"trader_postcode_match": bool(result.traderPostcodeMatch),
+			"trader_city_match": bool(result.traderCityMatch),
+			"request_id": result.requestIdentifier,
+			"actual_trader_name": result.traderName,
+			"actual_trader_address": result.traderAddress,
+		},
+		notify=True,
+	)
diff --git a/erpnext_germany/erpnext_germany/doctype/vat_id_check/vat_id_check_list.js b/erpnext_germany/erpnext_germany/doctype/vat_id_check/vat_id_check_list.js
new file mode 100644
index 00000000..8a5ef26c
--- /dev/null
+++ b/erpnext_germany/erpnext_germany/doctype/vat_id_check/vat_id_check_list.js
@@ -0,0 +1,17 @@
+frappe.listview_settings["VAT ID Check"] = {
+	add_fields: ["is_valid"],
+	hide_name_column: true,
+	get_indicator: function (doc) {
+		if (doc.status === "Completed") {
+			return doc.is_valid === 1
+			? [__("Valid"), "green", "is_valid,=,Yes"]
+			: [__("Invalid"), "red", "is_valid,=,No"];
+		} else if (doc.status === "Planned") {
+			return [__("Planned"), "blue", "status,=,Planned"];
+		} else if (doc.status === "Running") {
+			return [__("Running"), "yellow", "status,=,Running"];
+		} else if (["Service Unavailable", "Invalid Input"].includes(doc.status)) {
+			return [__(doc.status), "gray", `status,=,${doc.status}`];
+		}
+	},
+};
diff --git a/erpnext_germany/hooks.py b/erpnext_germany/hooks.py
index 5e4c28cb..abb596e4 100644
--- a/erpnext_germany/hooks.py
+++ b/erpnext_germany/hooks.py
@@ -16,7 +16,7 @@
 
 # include js, css files in header of desk.html
 # app_include_css = "/assets/erpnext_germany/css/erpnext_germany.css"
-app_include_js = "/assets/erpnext_germany/js/validate_vat_id.js"
+# app_include_js = "/assets/erpnext_germany/js/erpnext_germany.js"
 
 # include js, css files in header of web template
 # web_include_css = "/assets/erpnext_germany/css/erpnext_germany.css"
@@ -33,10 +33,7 @@
 # page_js = {"page" : "public/js/file.js"}
 
 # include js in doctype views
-doctype_js = {
-	"Customer": "public/js/customer.js",
-	"Supplier": "public/js/supplier.js",
-}
+# doctype_js = {}
 # doctype_list_js = {"doctype" : "public/js/doctype_list.js"}
 # doctype_tree_js = {"doctype" : "public/js/doctype_tree.js"}
 # doctype_calendar_js = {"doctype" : "public/js/doctype_calendar.js"}
@@ -122,10 +119,10 @@
 # Scheduled Tasks
 # ---------------
 
-# scheduler_events = {
-# 	"all": [
-# 		"erpnext_germany.tasks.all"
-# 	],
+scheduler_events = {
+	"all": [
+		"erpnext_germany.tasks.all"
+	],
 # 	"daily": [
 # 		"erpnext_germany.tasks.daily"
 # 	],
@@ -138,7 +135,7 @@
 # 	"monthly": [
 # 		"erpnext_germany.tasks.monthly"
 # 	],
-# }
+}
 
 # Testing
 # -------
@@ -374,3 +371,16 @@ def get_register_fields(insert_after: str):
 		("current_accommodation_type", "hidden", 1, "Check"),
 	],
 }
+
+germany_custom_records = [
+	{
+		"doctype": "DocType Link",
+		"parent": "Customer",
+		"parentfield": "links",
+		"parenttype": "Customize Form",
+		"group": "Pre Sales",
+		"link_doctype": "VAT ID Check",
+		"link_fieldname": "customer",
+		"custom": 1,
+	},
+]
diff --git a/erpnext_germany/install.py b/erpnext_germany/install.py
index ff20275a..aedc8eda 100644
--- a/erpnext_germany/install.py
+++ b/erpnext_germany/install.py
@@ -10,6 +10,7 @@ def after_install():
 	create_custom_fields(custom_fields)
 	make_property_setters()
 	import_data()
+	insert_custom_records()
 
 
 def import_data():
@@ -46,3 +47,15 @@ def make_property_setters():
 			for property_setter in property_setters:
 				for_doctype = not property_setter[0]
 				make_property_setter(doctype, *property_setter, for_doctype)
+
+
+def insert_custom_records():
+	for custom_record in frappe.get_hooks("germany_custom_records"):
+		filters = custom_record.copy()
+		# Clean up filters. They need to be a plain dict without nested dicts or lists.
+		for key, value in custom_record.items():
+			if isinstance(value, (list, dict)):
+				del filters[key]
+
+		if not frappe.db.exists(filters):
+			frappe.get_doc(custom_record).insert(ignore_if_duplicate=True)
diff --git a/erpnext_germany/patches.txt b/erpnext_germany/patches.txt
index 126d8c66..95ccad41 100644
--- a/erpnext_germany/patches.txt
+++ b/erpnext_germany/patches.txt
@@ -1,2 +1,3 @@
 execute:from erpnext_germany.install import after_install; after_install() # 7
 erpnext_germany.patches.add_tax_exemption_reason_fields
+execute:from erpnext_germany.install import insert_custom_records; insert_custom_records()
diff --git a/erpnext_germany/public/js/customer.js b/erpnext_germany/public/js/customer.js
deleted file mode 100644
index 5a903a9b..00000000
--- a/erpnext_germany/public/js/customer.js
+++ /dev/null
@@ -1,5 +0,0 @@
-frappe.ui.form.on("Customer", {
-	setup: function (frm) {
-		erpnext_germany.utils.setup_vat_id_validation_button(frm);
-	}
-});
\ No newline at end of file
diff --git a/erpnext_germany/public/js/supplier.js b/erpnext_germany/public/js/supplier.js
deleted file mode 100644
index 9f77d6d5..00000000
--- a/erpnext_germany/public/js/supplier.js
+++ /dev/null
@@ -1,5 +0,0 @@
-frappe.ui.form.on("Supplier", {
-	setup: function (frm) {
-		erpnext_germany.utils.setup_vat_id_validation_button(frm);
-	}
-});
\ No newline at end of file
diff --git a/erpnext_germany/public/js/validate_vat_id.js b/erpnext_germany/public/js/validate_vat_id.js
deleted file mode 100644
index 6930dde9..00000000
--- a/erpnext_germany/public/js/validate_vat_id.js
+++ /dev/null
@@ -1,51 +0,0 @@
-
-frappe.provide("erpnext_germany.utils");
-
-erpnext_germany.utils.setup_vat_id_validation_button = function (frm) {
-	const $wrapper = $(frm.fields_dict.tax_id.input_area);
-	const $link_button = $(
-		`<span class="link-btn"
-			style="top: 2px; right: 2px;"
-		>
-            <a
-				class="btn btn-xs btn-default"
-				title="${__("Validate EU VAT ID")}"
-				style="padding: 3px;"
-			>
-                ${frappe.utils.icon("search", "sm")}
-            </a>
-        </span>`
-	);
-
-	$($wrapper).append($link_button);
-	$link_button.toggle(true);
-	$link_button.on("click", "a", () => {
-		const vat_id = frm.doc.tax_id;
-		erpnext_germany.utils.check_vat_id(vat_id)
-			.then((is_valid) => {
-				if (is_valid === true) {
-					frappe.show_alert({
-						message: __("Tax ID is a valid EU VAT ID"),
-						indicator: "green",
-					});
-				} else if (is_valid === false) {
-					frappe.show_alert({
-						message: __("Tax ID is not a valid EU VAT ID"),
-						indicator: "red",
-					});
-				} else {
-					frappe.show_alert({
-						message: __("Tax ID could not be validated"),
-						indicator: "grey",
-					});
-				}
-			});
-	});
-};
-
-erpnext_germany.utils.check_vat_id = function (vat_id) {
-	return frappe.xcall(
-		"erpnext_germany.api.validate_vat_id",
-		{ vat_id: vat_id },
-	);
-};
diff --git a/erpnext_germany/tasks.py b/erpnext_germany/tasks.py
new file mode 100644
index 00000000..db9341ac
--- /dev/null
+++ b/erpnext_germany/tasks.py
@@ -0,0 +1,67 @@
+from erpnext import get_default_company
+import frappe
+
+
+def all():
+	check_some_customers()
+
+
+def get_customers(batch_size=4):
+	"""Return a list of n customers who didn't have their VAT ID checked in the last 3 months."""
+	from pypika import functions as fn, Interval
+	from frappe.query_builder import DocType
+
+	customers = DocType("Customer")
+	vat_id_checks = DocType("VAT ID Check")
+	last_check = (
+		frappe.qb.from_(vat_id_checks)
+		.select(
+			vat_id_checks.customer,
+			fn.Max(vat_id_checks.creation).as_("creation"),
+		)
+		.groupby(vat_id_checks.customer)
+	)
+
+	return (
+		frappe.qb.from_(customers)
+		.left_join(last_check)
+		.on(customers.name == last_check.customer)
+		.select(
+			customers.name,
+			customers.customer_name,
+			customers.customer_primary_address,
+			customers.tax_id
+		)
+		.where(
+			customers.tax_id.notnull()
+			& (customers.disabled == 0)
+			& (
+				last_check.creation.isnull()
+				| (last_check.creation < fn.Now() - Interval(months=3))
+			)
+		)
+		.limit(batch_size)
+		.run()
+	)
+
+
+def check_some_customers():
+	"""Check VAT IDs of customers who didn't have their VAT ID checked in the last 3 months."""
+	requester_vat_id = None
+	if company := get_default_company():
+		requester_vat_id = frappe.get_cached_value("Company", company, "tax_id")
+
+	for customer, customer_name, primary_address, vat_id in get_customers():
+		doc = frappe.new_doc("VAT ID Check")
+		doc.customer = customer
+		doc.trader_name = customer_name
+		doc.customer_vat_id = vat_id
+		doc.company = company
+		doc.requester_vat_id = requester_vat_id
+		if primary_address:
+			address = frappe.get_doc("Address", primary_address)
+			doc.trader_street = address.address_line1
+			doc.trader_postcode = address.pincode
+			doc.trader_city = address.city
+
+		doc.insert(ignore_permissions=True)
diff --git a/erpnext_germany/translations/de.csv b/erpnext_germany/translations/de.csv
index 0772e634..ff7e2060 100644
--- a/erpnext_germany/translations/de.csv
+++ b/erpnext_germany/translations/de.csv
@@ -16,3 +16,12 @@ Has Children,Hat Kinder
 Highest School Qualification,Höchster Schulabschluss
 Has Other Employments,Hat Nebenbeschäftigungen
 Tax Exemption Reason,Steuerbefreiungsgrund,
+VAT ID Check,USt-IdNr Prüfung
+Request ID,Anfrage ID
+Is Valid,Ist gültig
+Valid,Gültig
+Invalid,Ungültig
+Requester VAT ID,USt-IdNr. des Anfragenden
+Customer VAT ID,USt-IdNr. des Kunden
+Result,Ergebnis
+Requester,Anfragender
diff --git a/erpnext_germany/uninstall.py b/erpnext_germany/uninstall.py
index dbbe8eb9..6ba5a730 100644
--- a/erpnext_germany/uninstall.py
+++ b/erpnext_germany/uninstall.py
@@ -4,6 +4,7 @@
 def before_uninstall():
 	remove_custom_fields()
 	remove_property_setters()
+	remove_custom_records()
 
 
 def remove_custom_fields():
@@ -35,3 +36,10 @@ def remove_property_setters():
 					"value": ps[-2]
 				}
 			)
+
+
+def remove_custom_records():
+	print("* removing custom records...")
+	for record in frappe.get_hooks("germany_custom_records"):
+		doctype = record.pop("doctype")
+		frappe.db.delete(doctype, record)
diff --git a/erpnext_germany/utils/eu_vat.py b/erpnext_germany/utils/eu_vat.py
index 097f793a..6e8e5a3d 100644
--- a/erpnext_germany/utils/eu_vat.py
+++ b/erpnext_germany/utils/eu_vat.py
@@ -1,12 +1,68 @@
-import zeep
+import re
 
+from tenacity import (
+	retry,
+	retry_any,
+	retry_if_exception_message,
+	stop_after_attempt,
+	wait_exponential,
+)
+from zeep import Client
 
-def is_valid_eu_vat_id(vat_id) -> bool:
-	"""Use the EU VAT checker to validate a VAT ID."""
+WSDL_URL = "https://ec.europa.eu/taxation_customs/vies/checkVatService.wsdl"
+COUNTRY_CODE_REGEX = r"^[A-Z]{2}$"
+VAT_NUMBER_REGEX = r"^[0-9A-Za-z\+\*\.]{2,12}$"
+
+
+def parse_vat_id(vat_id: str) -> tuple[str, str]:
 	country_code = vat_id[:2].upper()
 	vat_number = vat_id[2:].replace(" ", "")
 
-	client = zeep.Client("https://ec.europa.eu/taxation_customs/vies/checkVatService.wsdl")
-	result = client.service.checkVat(vatNumber=vat_number, countryCode=country_code)
+	# check vat_number and country_code with regex
+	if not re.match(COUNTRY_CODE_REGEX, country_code):
+		raise ValueError("Invalid country code")
+
+	if not re.match(VAT_NUMBER_REGEX, vat_number):
+		raise ValueError("Invalid VAT number")
+
+	return country_code, vat_number
+
+
+def check_vat(country_code: str, vat_number: str):
+	"""Use the EU VAT checker to validate a VAT ID."""
+	return Client(WSDL_URL).service.checkVat(
+		vatNumber=vat_number, countryCode=country_code
+	)
+
 
-	return result.valid
+@retry(
+	retry=retry_any(
+		retry_if_exception_message(message="GLOBAL_MAX_CONCURRENT_REQ"),
+		retry_if_exception_message(message="MS_MAX_CONCURRENT_REQ"),
+		retry_if_exception_message(message="SERVICE_UNAVAILABLE"),
+		retry_if_exception_message(message="MS_UNAVAILABLE"),
+		retry_if_exception_message(message="TIMEOUT"),
+	),
+	stop=stop_after_attempt(3),
+	wait=wait_exponential(multiplier=1, min=2, max=64),
+)
+def check_vat_approx(
+	country_code: str,
+	vat_number: str,
+	trader_name: str | None = None,
+	trader_street: str | None = None,
+	trader_postcode: str | None = None,
+	trader_city: str | None = None,
+	requester_country_code: str | None = None,
+	requester_vat_number: str | None = None,
+):
+	return Client(WSDL_URL).service.checkVatApprox(
+		countryCode=country_code,
+		vatNumber=vat_number,
+		traderName=trader_name,
+		traderStreet=trader_street,
+		traderPostcode=trader_postcode,
+		traderCity=trader_city,
+		requesterCountryCode=requester_country_code,
+		requesterVatNumber=requester_vat_number,
+	)
diff --git a/requirements.txt b/requirements.txt
index 1243fdf9..b4bb2dbd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,3 @@
 # frappe -- https://github.com/frappe/frappe is installed via 'bench init'
-zeep
\ No newline at end of file
+zeep
+tenacity