diff --git a/resources/views/app.blade.php b/resources/views/app.blade.php
index 7284121..78b2430 100644
--- a/resources/views/app.blade.php
+++ b/resources/views/app.blade.php
@@ -13,7 +13,7 @@
 <head>
     <meta charset="utf-8">
     <meta name="viewport" content="width=device-width, initial-scale=1">
-    <title>Checkout · {{ config('checkout.merchant') ?: config('app.name') }}</title>
+    <title>Checkout · {{ config('lunar.checkout.merchant') ?: config('app.name') }}</title>
 
     {{-- Tab icon (CheckoutTheme::favicon). The checkout is its own document,
          so without this the tab shows the browser's blank globe. --}}
diff --git a/spec/0008-checkout-ui-and-theming.md b/spec/0008-checkout-ui-and-theming.md
index e32a7ea..2fdd014 100644
--- a/spec/0008-checkout-ui-and-theming.md
+++ b/spec/0008-checkout-ui-and-theming.md
@@ -201,7 +201,7 @@ from the current channel. Same seam, runtime-resolved.
 **Favicon and tab title (added in run 1 of the master test plan).** `CheckoutTheme::favicon`
 is a URL/path validated by the same chokepoint as `logo` and `stylesheet`, projected as
 `favicon` and rendered by the root view as `<link rel="icon">`. The tab title is
-"Checkout · {merchant}" from `checkout.merchant`, falling back to the app name. Without
+"Checkout · {merchant}" from `lunar.checkout.merchant`, falling back to the app name. Without
 either, the checkout's own document showed the browser's blank globe and a bare "Checkout".
 
 ### E. Three customisation tiers (light → heavy)
diff --git a/src/Http/Controllers/CheckoutController.php b/src/Http/Controllers/CheckoutController.php
index f6e0f5a..0bdf6ee 100644
--- a/src/Http/Controllers/CheckoutController.php
+++ b/src/Http/Controllers/CheckoutController.php
@@ -386,7 +386,7 @@ private function projectCheckout(CheckoutDriver $driver, CheckoutSessionModel $s
 
         return [
             'uuid' => $session->uuid,
-            'merchant' => config('checkout.merchant') ?: config('app.name'),
+            'merchant' => $this->merchant(),
             'currency' => $snapshot->currencyCode,
             'items' => array_map(fn (array $line): array => [
                 'id' => $line['identifier'],
@@ -451,6 +451,15 @@ private function projectCheckout(CheckoutDriver $driver, CheckoutSessionModel $s
         ];
     }
 
+    /**
+     * The store name in the checkout header: the configured merchant, falling
+     * back to the application name. The root view's tab title reads the same.
+     */
+    private function merchant(): string
+    {
+        return (string) (config('lunar.checkout.merchant') ?: config('app.name'));
+    }
+
     /**
      * The session's write/navigation endpoints the checkout Vue app (and the
      * host-page express mount's JSON start response) drive it through.
@@ -1243,7 +1252,7 @@ public function processing(CheckoutSessionModel $session, ReconcilesCheckoutSess
 
         return Inertia::render('Processing', [
             'pollUrl' => route('lunar.checkout.processing', $session->uuid),
-            'merchant' => config('app.name', 'Store'),
+            'merchant' => $this->merchant(),
             'theme' => $theme->tokens(),
             'branding' => $theme->branding(),
             'stylesheet' => $theme->stylesheet(),
diff --git a/tests/Feature/CheckoutRouteTest.php b/tests/Feature/CheckoutRouteTest.php
index d67982b..dd486c7 100644
--- a/tests/Feature/CheckoutRouteTest.php
+++ b/tests/Feature/CheckoutRouteTest.php
@@ -98,7 +98,7 @@ function routeTestCart(): Cart
 });
 
 it('projects the configured merchant name into the header prop', function () {
-    config(['checkout.merchant' => 'Edwardes Bros']);
+    config(['lunar.checkout.merchant' => 'Edwardes Bros']);
 
     // Needs lines: show() bounces a session whose cart is empty.
     $cart = CheckoutCart::orderable();
@@ -114,7 +114,7 @@ function routeTestCart(): Cart
 });
 
 it('falls back to the app name when no merchant is configured', function () {
-    config(['checkout.merchant' => null, 'app.name' => 'Lunar Store']);
+    config(['lunar.checkout.merchant' => null, 'app.name' => 'Lunar Store']);
 
     // Needs lines: show() bounces a session whose cart is empty.
     $cart = CheckoutCart::orderable();
diff --git a/tests/Feature/CheckoutThemeBrandingTest.php b/tests/Feature/CheckoutThemeBrandingTest.php
index 53cd285..e2a8e20 100644
--- a/tests/Feature/CheckoutThemeBrandingTest.php
+++ b/tests/Feature/CheckoutThemeBrandingTest.php
@@ -13,7 +13,7 @@
  */
 it('renders the theme favicon and the merchant name in the root view head', function () {
     app()->bind(CheckoutTheme::class, fn (): CheckoutTheme => CheckoutTheme::tender()->with(favicon: '/favicon.svg'));
-    config()->set('checkout.merchant', 'Edwardes Bros');
+    config()->set('lunar.checkout.merchant', 'Edwardes Bros');
 
     $cart = CheckoutCart::orderable();
     $session = CheckoutCart::session($cart);
diff --git a/tests/Feature/PaymentMethodAvailabilityTest.php b/tests/Feature/PaymentMethodAvailabilityTest.php
index 27b204c..e9a1ba5 100644
--- a/tests/Feature/PaymentMethodAvailabilityTest.php
+++ b/tests/Feature/PaymentMethodAvailabilityTest.php
@@ -193,6 +193,23 @@ public function unavailableReason(Cart $cart): ?string
     expect($registry->unavailableReasons($large))->toBe([]);
 });
 
+it('renders the checkout before any payment method is registered', function () {
+    $cart = CheckoutCart::orderable();
+    $session = CheckoutCart::session($cart);
+
+    $this->get(route('lunar.checkout.show', $session->uuid), ['X-Inertia' => 'true'])
+        ->assertOk()
+        ->assertJsonCount(0, 'props.checkout.paymentMethods')
+        ->assertJsonPath('props.checkout.paymentUnavailable', []);
+
+    $this->postJson(route('lunar.checkout.pay', $session->uuid), [
+        'fingerprint' => CheckoutCart::fingerprint($session),
+        'payment_method' => 'offline',
+    ])->assertStatus(422);
+
+    expect(Order::query()->count())->toBe(0);
+});
+
 it('projects why the payment region is empty', function () {
     app(PaymentMethodRegistry::class)->add(MinimumSpendMethod::class);
 
diff --git a/tests/Feature/PaymentReleaseTest.php b/tests/Feature/PaymentReleaseTest.php
index 9ceaf27..640b969 100644
--- a/tests/Feature/PaymentReleaseTest.php
+++ b/tests/Feature/PaymentReleaseTest.php
@@ -221,6 +221,17 @@ function pinnedSession(array $overrides = [])
     expect($session->refresh()->status)->toBeInstanceOf(PaymentProcessing::class);
 });
 
+it('processing shows the same merchant name as the checkout', function () {
+    ReleaseTestGateway::$status = PaymentIntentStatus::Pending;
+    config(['lunar.checkout.merchant' => 'Edwardes Bros', 'app.name' => 'Lunar Store']);
+
+    $session = pinnedSession();
+
+    $this->get(route('lunar.checkout.processing', $session->uuid), ['X-Inertia' => 'true'])
+        ->assertOk()
+        ->assertJsonPath('props.merchant', 'Edwardes Bros');
+});
+
 it('processing redirects an already completed session straight to success', function () {
     $session = pinnedSession();
     $session->forceFill(['status' => Completed::$name, 'success_url' => 'https://store.test/thanks'])->save();