diff --git a/core/components/minishop3/src/Controllers/Customer/Customer.php b/core/components/minishop3/src/Controllers/Customer/Customer.php
index ebf23747..0243bdae 100644
--- a/core/components/minishop3/src/Controllers/Customer/Customer.php
+++ b/core/components/minishop3/src/Controllers/Customer/Customer.php
@@ -302,17 +302,6 @@ public function validate(string $key, mixed $value): mixed
         return $response['data']['value'];
     }
 
-    /**
-     * Get customer ID for order (legacy method)
-     *
-     * @deprecated Use getOrCreate() instead
-     * @return int Customer ID or 0 if not found/created
-     */
-    public function getId(): int
-    {
-        return $this->getOrCreate();
-    }
-
     public function create(array $customerData): msCustomer|null
     {
         // Allow plugins to modify data before creation
diff --git a/core/components/minishop3/src/Services/Customer/RegisterService.php b/core/components/minishop3/src/Services/Customer/RegisterService.php
index 546e12f7..ebc46a23 100644
--- a/core/components/minishop3/src/Services/Customer/RegisterService.php
+++ b/core/components/minishop3/src/Services/Customer/RegisterService.php
@@ -67,7 +67,7 @@ public function setEmailVerification(EmailVerificationService $service): void
      *
      * Used in:
      * - Register API processor (explicit user registration)
-     * - Customer::getId() (automatic registration during checkout)
+     * - Customer::getOrCreate() (automatic registration during checkout)
      *
      * @param array $data Customer data:
      *   - email (required)
diff --git a/core/components/minishop3/src/Services/Order/OrderService.php b/core/components/minishop3/src/Services/Order/OrderService.php
index cc722446..42250edf 100644
--- a/core/components/minishop3/src/Services/Order/OrderService.php
+++ b/core/components/minishop3/src/Services/Order/OrderService.php
@@ -118,38 +118,6 @@ public function updateProducts(msOrder $order): bool
         return $order->save();
     }
 
-    /**
-     * Handle order save with events
-     *
-     * @deprecated Logic moved to msOrder::save(), this method kept for backward compatibility
-     *
-     * @param msOrder $order
-     * @param bool|null $cacheFlag
-     * @return bool
-     */
-    public function handleOrderSave(msOrder $order, ?bool $cacheFlag = null): bool
-    {
-        // Simply delegate call to msOrder::save()
-        // It already contains all event logic
-        return $order->save($cacheFlag);
-    }
-
-    /**
-     * Delete order with events
-     *
-     * @deprecated Logic moved to msOrder::remove(), this method kept for backward compatibility
-     *
-     * @param msOrder $order
-     * @param array $ancestors
-     * @return bool Deletion result
-     */
-    public function removeOrder(msOrder $order, array $ancestors = []): bool
-    {
-        // Simply delegate call to msOrder::remove()
-        // It already contains all event logic
-        return $order->remove($ancestors);
-    }
-
     /**
      * Get order statistics
      *
diff --git a/core/components/minishop3/tests/Unit/Regression/DeprecatedPassThroughRemovedTest.php b/core/components/minishop3/tests/Unit/Regression/DeprecatedPassThroughRemovedTest.php
new file mode 100644
index 00000000..23496274
--- /dev/null
+++ b/core/components/minishop3/tests/Unit/Regression/DeprecatedPassThroughRemovedTest.php
@@ -0,0 +1,48 @@
+<?php
+
+declare(strict_types=1);
+
+namespace MiniShop3\Tests\Unit\Regression;
+
+use MiniShop3\Controllers\Customer\Customer;
+use MiniShop3\Services\Order\OrderService;
+use PHPUnit\Framework\Attributes\DataProvider;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * Regression #357: deprecated pass-through wrappers must stay removed from core.
+ *
+ * The original OrderService::handleOrderSave() / removeOrder() and
+ * Customer::getId() wrappers were deleted in favor of calling msOrder::save() /
+ * msOrder::remove() and Customer::getOrCreate() directly. These assertions
+ * guard against accidental reintroduction via reflection only — they do not
+ * scan the source tree, which keeps the test fast and free of false positives
+ * from comments, lexicon strings, or unrelated modules.
+ */
+final class DeprecatedPassThroughRemovedTest extends TestCase
+{
+    /**
+     * @return iterable<string, array{0: class-string, 1: string}>
+     */
+    public static function removedPassThroughsProvider(): iterable
+    {
+        yield 'OrderService::handleOrderSave' => [OrderService::class, 'handleOrderSave'];
+        yield 'OrderService::removeOrder' => [OrderService::class, 'removeOrder'];
+        yield 'Customer::getId' => [Customer::class, 'getId'];
+    }
+
+    #[DataProvider('removedPassThroughsProvider')]
+    public function testDeprecatedPassThroughIsRemoved(string $class, string $method): void
+    {
+        self::assertFalse(
+            method_exists($class, $method),
+            sprintf('%s::%s() must remain removed (deprecated pass-through).', $class, $method)
+        );
+
+        $reflection = new \ReflectionClass($class);
+        self::assertFalse(
+            $reflection->hasMethod($method),
+            sprintf('%s::%s() must not be redeclared (checked via reflection).', $class, $method)
+        );
+    }
+}