diff --git a/README.md b/README.md
index 790d608..8f8da72 100644
--- a/README.md
+++ b/README.md
@@ -38,6 +38,32 @@ imports:
     - { resource: "@SetonoSyliusQuickpayPlugin/Resources/config/app/fixtures.yaml" }    
 ````
 
+### 5: Add validator constraint 
+
+Create `config/validator/Address.xml`:
+
+```xml
+<?xml version="1.0" encoding="UTF-8"?>
+
+<constraint-mapping xmlns="http://symfony.com/schema/dic/constraint-mapping"
+                    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+                    xsi:schemaLocation="http://symfony.com/schema/dic/constraint-mapping http://symfony.com/schema/dic/services/constraint-mapping-1.0.xsd">
+    <class name="Sylius\Component\Addressing\Model\Address">
+        <constraint name="Setono\SyliusQuickpayPlugin\Validator\Constraints\AddressStreetEligibility">
+            <option name="message">setono_sylius_quickpay.address.street_eligibility</option>
+            <option name="groups">
+                <value>sylius_shipping_address_update</value>
+                <value>sylius_checkout_complete</value>
+                <value>sylius</value>
+            </option>
+        </constraint>
+    </class>
+</constraint-mapping>
+
+```
+
+Like it [configured](tests/Application/config/validator/Address.xml) at example application.
+
 ## Configuration
 
 Create a new Payment method of the type *Quickpay* and fill out the required form fields.
diff --git a/src/Action/ConvertPaymentAction.php b/src/Action/ConvertPaymentAction.php
index 7a66b44..2b2c25a 100644
--- a/src/Action/ConvertPaymentAction.php
+++ b/src/Action/ConvertPaymentAction.php
@@ -25,6 +25,7 @@
 use Sylius\Component\Core\Model\ProductVariantInterface;
 use Symfony\Component\Intl\Countries;
 use VIISON\AddressSplitter\AddressSplitter;
+use VIISON\AddressSplitter\Exceptions\SplittingException;
 use Webmozart\Assert\Assert;
 
 /**
@@ -107,17 +108,43 @@ protected function convertAddress(AddressInterface $address, CustomerInterface $
         $street = $address->getStreet();
         Assert::notNull($street);
 
-        $splittedStreet = AddressSplitter::splitAddress($street);
-
         $details = [];
+        switch (mb_strtoupper($countryCode)) {
+            case 'DE':
+                try {
+                    $splittedStreet = AddressSplitter::splitAddress($street);
+
+                    $details['street'] = $splittedStreet['streetName'];
+                    $details['house_number'] = $splittedStreet['houseNumber'];
+                } catch (SplittingException $e) {
+                    $details['street'] = $street;
+                    $details['house_number'] = '';
+                }
+
+                break;
+            case 'NL':
+                try {
+                    $splittedStreet = AddressSplitter::splitAddress($street);
+
+                    $details['street'] = $splittedStreet['streetName'];
+                    $details['house_number'] = $splittedStreet['houseNumberParts']['base'];
+                    $details['house_extension'] = $splittedStreet['houseNumberParts']['extension'];
+                } catch (SplittingException $e) {
+                    $details['street'] = $street;
+                    $details['house_number'] = '';
+                    $details['house_extension'] = '';
+                }
+
+                break;
+            default:
+                $details['street'] = $street;
+        }
+
         $details['name'] = sprintf(
             '%s %s',
             $address->getFirstName(),
             $address->getLastName()
         );
-        $details['street'] = $splittedStreet['streetName'];
-        $details['house_number'] = $splittedStreet['houseNumberParts']['base'];
-        $details['house_extension'] = $splittedStreet['houseNumberParts']['extension'];
         $details['city'] = $address->getCity();
         $details['zip_code'] = $address->getPostcode();
         $details['region'] = $address->getProvinceName() ?? $address->getProvinceCode();
diff --git a/src/Checker/StreetEligibilityChecker.php b/src/Checker/StreetEligibilityChecker.php
new file mode 100644
index 0000000..c3c45f8
--- /dev/null
+++ b/src/Checker/StreetEligibilityChecker.php
@@ -0,0 +1,49 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Setono\SyliusQuickpayPlugin\Checker;
+
+use Sylius\Component\Addressing\Model\AddressInterface;
+use VIISON\AddressSplitter\AddressSplitter;
+use VIISON\AddressSplitter\Exceptions\SplittingException;
+use Webmozart\Assert\Assert;
+
+class StreetEligibilityChecker implements StreetEligibilityCheckerInterface
+{
+    public function isEligible(AddressInterface $address): bool
+    {
+        $countryCode = $address->getCountryCode();
+        Assert::notNull($countryCode);
+
+        $street = $address->getStreet();
+        if (null === $street) {
+            return false;
+        }
+
+        try {
+            switch (mb_strtoupper($countryCode)) {
+                case 'DE':
+                    $splittedStreet = AddressSplitter::splitAddress($street);
+                    if ('' === $splittedStreet['houseNumber']) {
+                        return false;
+                    }
+
+                    break;
+                case 'NL':
+                    $splittedStreet = AddressSplitter::splitAddress($street);
+                    if ('' === $splittedStreet['houseNumberParts']['base']) {
+                        return false;
+                    }
+
+                    if ('' === $splittedStreet['houseNumberParts']['extension']) {
+                        return false;
+                    }
+            }
+        } catch (SplittingException $e) {
+            return false;
+        }
+
+        return true;
+    }
+}
diff --git a/src/Checker/StreetEligibilityCheckerInterface.php b/src/Checker/StreetEligibilityCheckerInterface.php
new file mode 100644
index 0000000..bc7bed3
--- /dev/null
+++ b/src/Checker/StreetEligibilityCheckerInterface.php
@@ -0,0 +1,12 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Setono\SyliusQuickpayPlugin\Checker;
+
+use Sylius\Component\Addressing\Model\AddressInterface;
+
+interface StreetEligibilityCheckerInterface
+{
+    public function isEligible(AddressInterface $address): bool;
+}
diff --git a/src/Fixture/KlarnaTestShopUserFixture.php b/src/Fixture/KlarnaTestShopUserFixture.php
index 02d682c..16fdd4e 100644
--- a/src/Fixture/KlarnaTestShopUserFixture.php
+++ b/src/Fixture/KlarnaTestShopUserFixture.php
@@ -129,7 +129,7 @@ protected function getKlarnaTestDataByCountry(string $countryCode, array $option
                 'city' => 'Hausmannstätten',
                 'postcode' => $options['approved'] ? '8071' : '8070',
                 'gender' => $options['approved'] ? CustomerInterface::MALE_GENDER : CustomerInterface::FEMALE_GENDER,
-                'birthday' => $options['approved'] ? '1960-04-14' : '1980-04-14',
+                'birthday' => $options['approved'] ? '1960-04-14 00:00:00' : '1980-04-14 00:00:00',
             ],
             'FI' => [
                 'phone_number' => '0401234567',
@@ -149,7 +149,7 @@ protected function getKlarnaTestDataByCountry(string $countryCode, array $option
                 'city' => 'Neuss',
                 'postcode' => '41460',
                 'gender' => CustomerInterface::MALE_GENDER,
-                'birthday' => '1960-07-07',
+                'birthday' => '1960-07-07 00:00:00',
             ],
             'NO' => [
                 'phone_number' => '40 123 456',
@@ -163,7 +163,7 @@ protected function getKlarnaTestDataByCountry(string $countryCode, array $option
                 'city' => 'Gravenhage',
                 'postcode' => '2521VA',
                 'gender' => CustomerInterface::MALE_GENDER,
-                'birthday' => '1960-07-10',
+                'birthday' => '1960-07-10 00:00:00',
             ],
             'CH' => [
                 'first_name' => $options['approved'] ? $this->faker->firstName : 'test',
@@ -173,7 +173,7 @@ protected function getKlarnaTestDataByCountry(string $countryCode, array $option
                 'city' => 'Zürich',
                 'postcode' => '8001',
                 'gender' => CustomerInterface::MALE_GENDER,
-                'birthday' => '1960-01-01',
+                'birthday' => '1960-01-01 00:00:00',
             ],
         ];
 
diff --git a/src/Resources/config/app/fixtures.yaml b/src/Resources/config/app/fixtures.yaml
index 0b2e567..1025d65 100644
--- a/src/Resources/config/app/fixtures.yaml
+++ b/src/Resources/config/app/fixtures.yaml
@@ -3,6 +3,19 @@ sylius_fixtures:
         default:
             fixtures:
 
+                geographical:
+                    options:
+                        countries:
+                            - 'US'
+                            - 'DK'
+                            - 'NL'
+                        zones:
+                            EU:
+                                name: "EU"
+                                scope: "all"
+                                countries:
+                                    - 'DK'
+                                    - 'NL'
                 currency:
                     options:
                         currencies: 
@@ -30,12 +43,28 @@ sylius_fixtures:
                                     - "DKK"
                                 enabled: true
                                 hostname: "localhost"
+                            nl_web_store:
+                                name: "NL Web Store"
+                                code: 'NL_WEB'
+                                locales:
+                                    - "%locale%"
+                                currencies:
+                                    - "EUR"
+                                enabled: true
+                                hostname: "localhost"
 
-                setono_quickpay_klarna_test_shop_user:
+                setono_quickpay_klarna_test_shop_user_dk:
+                    name: setono_quickpay_klarna_test_shop_user
                     options:
                         amount: 10
                         country: DK
 
+                setono_quickpay_klarna_test_shop_user_nl:
+                    name: setono_quickpay_klarna_test_shop_user
+                    options:
+                        amount: 10
+                        country: NL
+
                 # Temporary fix for https://github.com/Sylius/Sylius/issues/10719
                 # @todo Remove this lines once issue will be fixed
                 order:
@@ -72,6 +101,7 @@ sylius_fixtures:
                                     - 'FASHION_WEB'
                                     - 'EU_WEB'
                                     - 'DK_WEB'
+                                    - 'NL_WEB'
                                 enabled: true
                             quickpay_klarna:
                                 code: 'quickpay_klarna'
@@ -97,6 +127,7 @@ sylius_fixtures:
                                     use_authorize: true
                                 channels:
                                     - 'DK_WEB'
+                                    - 'NL_WEB'
                                 enabled: true
 
                 shipping_method:
@@ -105,7 +136,24 @@ sylius_fixtures:
                             eu_courier:
                                 code: 'eu_courier'
                                 name: 'EU courier'
+                                zone: 'EU'
                                 enabled: true
                                 channels:
                                     - 'EU_WEB'
                                     - 'DK_WEB'
+                                    - 'NL_WEB'
+
+                cap_product_nl:
+                    name: product
+                    options:
+                        custom:
+                            -   name: 'Winter cap'
+                                tax_category: 'other'
+                                channels:
+                                    - 'NL_WEB'
+                                main_taxon: 'caps_with_pompons'
+                                taxons:
+                                    - 'caps'
+                                    - 'caps_with_pompons'
+                                images:
+                                    - { path: '@SyliusCoreBundle/Resources/fixtures/caps/cap_01.jpg', type: 'main' }
diff --git a/src/Resources/config/services.xml b/src/Resources/config/services.xml
index 3227727..f8bf06b 100644
--- a/src/Resources/config/services.xml
+++ b/src/Resources/config/services.xml
@@ -16,6 +16,20 @@
                  alias="setono_sylius_quickpay.quickpay.convert_payment" />
         </service>
 
+        <!-- Checker -->
+        <service id="setono_sylius_quickpay.street_eligibility_checker"
+                 class="Setono\SyliusQuickpayPlugin\Checker\StreetEligibilityChecker">
+        </service>
+
+        <!-- Validator -->
+        <service id="setono_sylius_quickpay.validator.eligible_street"
+                 class="Setono\SyliusQuickpayPlugin\Validator\AddressStreetEligibilityValidator">
+            <argument type="service" id="setono_sylius_quickpay.street_eligibility_checker" />
+
+            <tag name="validator.constraint_validator"
+                 alias="setono_sylius_quickpay_address_street_eligibility_validator" />
+        </service>
+
         <!-- State machine -->
         <service id="setono_sylius_quickpay.state_machine_resolver"
                  class="Setono\SyliusQuickpayPlugin\StateMachine\Resolver"
diff --git a/src/Resources/translations/validators.da.yaml b/src/Resources/translations/validators.da.yaml
index 13e26ca..49ebef5 100644
--- a/src/Resources/translations/validators.da.yaml
+++ b/src/Resources/translations/validators.da.yaml
@@ -12,3 +12,5 @@ setono_sylius_quickpay:
                     not_blank: Aftale id er påkrævet.
                 order_prefix:
                     max_length: Bør ikke være længere end 11 tegn.
+    address:
+        street_eligibility: Gaden skal indeholde husnummer (og udvidelse af husnummer for NL)
diff --git a/src/Resources/translations/validators.en.yaml b/src/Resources/translations/validators.en.yaml
index 0911f35..a751f92 100644
--- a/src/Resources/translations/validators.en.yaml
+++ b/src/Resources/translations/validators.en.yaml
@@ -12,3 +12,5 @@ setono_sylius_quickpay:
                     not_blank: Agreement id is required.
                 order_prefix:
                     max_length: Shouldn't be more than 11 chars length.
+    address:
+        street_eligibility: Street should contain house number (and extension for NL)
diff --git a/src/Validator/AddressStreetEligibilityValidator.php b/src/Validator/AddressStreetEligibilityValidator.php
new file mode 100644
index 0000000..e3e1e49
--- /dev/null
+++ b/src/Validator/AddressStreetEligibilityValidator.php
@@ -0,0 +1,37 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Setono\SyliusQuickpayPlugin\Validator;
+
+use Setono\SyliusQuickpayPlugin\Checker\StreetEligibilityCheckerInterface;
+use Setono\SyliusQuickpayPlugin\Validator\Constraints\AddressStreetEligibility;
+use Sylius\Component\Addressing\Model\AddressInterface;
+use Symfony\Component\Validator\Constraint;
+use Symfony\Component\Validator\ConstraintValidator;
+use Webmozart\Assert\Assert;
+
+final class AddressStreetEligibilityValidator extends ConstraintValidator
+{
+    /** @var StreetEligibilityCheckerInterface */
+    private $streetEligibilityChecker;
+
+    public function __construct(StreetEligibilityCheckerInterface $streetEligibilityChecker)
+    {
+        $this->streetEligibilityChecker = $streetEligibilityChecker;
+    }
+
+    public function validate($address, Constraint $constraint): void
+    {
+        Assert::isInstanceOf($address, AddressInterface::class);
+        Assert::isInstanceOf($constraint, AddressStreetEligibility::class);
+
+        if (!$this->streetEligibilityChecker->isEligible($address)) {
+            $this->context
+                ->buildViolation($constraint->message)
+                ->atPath('street')
+                ->addViolation()
+            ;
+        }
+    }
+}
diff --git a/src/Validator/Constraints/AddressStreetEligibility.php b/src/Validator/Constraints/AddressStreetEligibility.php
new file mode 100644
index 0000000..635226f
--- /dev/null
+++ b/src/Validator/Constraints/AddressStreetEligibility.php
@@ -0,0 +1,23 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Setono\SyliusQuickpayPlugin\Validator\Constraints;
+
+use Symfony\Component\Validator\Constraint;
+
+final class AddressStreetEligibility extends Constraint
+{
+    /** @var string */
+    public $message = 'setono_sylius_quickpay.address.street_eligibility';
+
+    public function validatedBy(): string
+    {
+        return 'setono_sylius_quickpay_address_street_eligibility_validator';
+    }
+
+    public function getTargets(): string
+    {
+        return self::CLASS_CONSTRAINT;
+    }
+}
diff --git a/tests/Application/config/validator/Address.xml b/tests/Application/config/validator/Address.xml
new file mode 100644
index 0000000..fa7b714
--- /dev/null
+++ b/tests/Application/config/validator/Address.xml
@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<constraint-mapping xmlns="http://symfony.com/schema/dic/constraint-mapping"
+                    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+                    xsi:schemaLocation="http://symfony.com/schema/dic/constraint-mapping http://symfony.com/schema/dic/services/constraint-mapping-1.0.xsd">
+    <class name="Sylius\Component\Addressing\Model\Address">
+        <constraint name="Setono\SyliusQuickpayPlugin\Validator\Constraints\AddressStreetEligibility">
+            <option name="message">setono_sylius_quickpay.address.street_eligibility</option>
+            <option name="groups">
+                <value>sylius_shipping_address_update</value>
+                <value>sylius_checkout_complete</value>
+                <value>sylius</value>
+            </option>
+        </constraint>
+    </class>
+</constraint-mapping>