diff --git a/src/GooglePlay/AbstractResponse.php b/src/GooglePlay/AbstractResponse.php
index a7e1c9c..ed16f8f 100644
--- a/src/GooglePlay/AbstractResponse.php
+++ b/src/GooglePlay/AbstractResponse.php
@@ -3,8 +3,7 @@
 namespace ReceiptValidator\GooglePlay;
 
 /**
- * Class AbstractResponse
- * @package ReceiptValidator\GooglePlay
+ * Class AbstractResponse.
  */
 abstract class AbstractResponse
 {
@@ -12,6 +11,8 @@ abstract class AbstractResponse
     const CONSUMPTION_STATE_CONSUMED = 1;
     const PURCHASE_STATE_PURCHASED = 0;
     const PURCHASE_STATE_CANCELED = 1;
+    const ACKNOWLEDGEMENT_STATE_YET_TO_BE = 0;
+    const ACKNOWLEDGEMENT_STATE_DONE = 1;
 
     /**
      * @var \Google_Service_AndroidPublisher_ProductPurchase|\Google_Service_AndroidPublisher_SubscriptionPurchase
@@ -19,7 +20,7 @@ abstract class AbstractResponse
     protected $response;
 
     /**
-     * Constructor
+     * Constructor.
      *
      * @param \Google_Service_AndroidPublisher_ProductPurchase|\Google_Service_AndroidPublisher_SubscriptionPurchase $response
      */
@@ -36,6 +37,22 @@ public function getDeveloperPayload()
         return $this->response->getDeveloperPayload();
     }
 
+    /**
+     * @return int
+     */
+    public function getAcknowledgementState()
+    {
+        return $this->response->acknowledgementState;
+    }
+
+    /**
+     * @return bool
+     */
+    public function isAcknowledged()
+    {
+        return $this->response->acknowledgementState === static::ACKNOWLEDGEMENT_STATE_DONE;
+    }
+
     /**
      * @return string
      */
diff --git a/src/GooglePlay/Acknowledger.php b/src/GooglePlay/Acknowledger.php
new file mode 100644
index 0000000..44fb667
--- /dev/null
+++ b/src/GooglePlay/Acknowledger.php
@@ -0,0 +1,95 @@
+<?php
+
+namespace ReceiptValidator\GooglePlay;
+
+/**
+ * Class Acknowledger.
+ */
+class Acknowledger
+{
+    const SUBSCRIPTION = 'SUBSCRIPTION';
+    const PRODUCT = 'PRODUCT';
+
+    /**
+     * @var \Google_Service_AndroidPublisher
+     */
+    protected $androidPublisherService;
+    /**
+     * @var string
+     */
+    protected $packageName;
+    /**
+     * @var string
+     */
+    protected $purchaseToken;
+    /**
+     * @var string
+     */
+    protected $productId;
+
+    /**
+     * Acknowledger constructor.
+     *
+     * @param \Google_Service_AndroidPublisher $googleServiceAndroidPublisher
+     * @param string                           $packageName
+     * @param string                           $purchaseToken
+     * @param string                           $productId
+     */
+    public function __construct(
+        \Google_Service_AndroidPublisher $googleServiceAndroidPublisher,
+        $packageName,
+        $productId,
+        $purchaseToken
+    ) {
+        $this->androidPublisherService = $googleServiceAndroidPublisher;
+        $this->packageName = $packageName;
+        $this->purchaseToken = $purchaseToken;
+        $this->productId = $productId;
+    }
+
+    /**
+     * @param string $type
+     * @param string $developerPayload
+     *
+     * @return bool
+     */
+    public function acknowledge(string $type = self::SUBSCRIPTION, string $developerPayload = '')
+    {
+        try {
+            switch ($type) {
+                case self::SUBSCRIPTION:
+                    $this->androidPublisherService->purchases_subscriptions->acknowledge(
+                        $this->packageName,
+                        $this->productId,
+                        $this->purchaseToken,
+                        new \Google_Service_AndroidPublisher_SubscriptionPurchasesAcknowledgeRequest(
+                            ['developerPayload' => $developerPayload]
+                        )
+                    );
+                    break;
+                case self::PRODUCT:
+                    $this->androidPublisherService->purchases_products->acknowledge(
+                        $this->packageName,
+                        $this->productId,
+                        $this->purchaseToken,
+                        new \Google_Service_AndroidPublisher_ProductPurchasesAcknowledgeRequest(
+                            ['developerPayload' => $developerPayload]
+                        )
+                    );
+                    break;
+                default:
+                    throw new \RuntimeException(
+                        \sprintf(
+                            'Invalid type provided : %s expected %s',
+                            $type,
+                            implode(',', [self::PRODUCT, self::SUBSCRIPTION])
+                        )
+                    );
+            }
+
+            return true;
+        } catch (\Exception $e) {
+            throw new \RuntimeException($e->getMessage(), $e);
+        }
+    }
+}
diff --git a/tests/GooglePlay/GooglePlayAcknowledgerTest.php b/tests/GooglePlay/GooglePlayAcknowledgerTest.php
new file mode 100755
index 0000000..6a4eda7
--- /dev/null
+++ b/tests/GooglePlay/GooglePlayAcknowledgerTest.php
@@ -0,0 +1,55 @@
+<?php
+
+namespace ReceiptValidator\Tests;
+
+use Google_Service_AndroidPublisher;
+use Google_Service_AndroidPublisher_Resource_PurchasesProducts;
+use Google_Service_AndroidPublisher_Resource_PurchasesSubscriptions;
+use PHPUnit\Framework\TestCase;
+use ReceiptValidator\GooglePlay\Acknowledger;
+
+/**
+ * @group library
+ */
+class GooglePlayAcknowledgerTest extends TestCase
+{
+    public function testValidate(): void
+    {
+        $packageName = 'testPackage';
+        $productId = '15';
+        $purchaseToken = 'testPurchaseToken';
+
+        // mock objects
+        $googleServiceAndroidPublisherMock = $this->getMockBuilder(Google_Service_AndroidPublisher::class)
+            ->disableOriginalConstructor()->getMock();
+        $productPurchaseMock = $this->getMockBuilder(Google_Service_AndroidPublisher_Resource_PurchasesProducts::class)
+            ->disableOriginalConstructor()->getMock();
+        $subscriptionPurchaseMock = $this->getMockBuilder(Google_Service_AndroidPublisher_Resource_PurchasesSubscriptions::class)
+            ->disableOriginalConstructor()->getMock();
+
+        // mock expectations
+        $googleServiceAndroidPublisherMock->purchases_products = $productPurchaseMock;
+        $googleServiceAndroidPublisherMock->purchases_subscriptions = $subscriptionPurchaseMock;
+
+        $productPurchaseMock->expects($this->once())->method('acknowledge')
+            ->with(
+                $packageName,
+                $productId,
+                $purchaseToken,
+                new \Google_Service_AndroidPublisher_ProductPurchasesAcknowledgeRequest(['developerPayload' => 'bar'])
+            );
+
+        $subscriptionPurchaseMock->expects($this->once())->method('acknowledge')
+            ->with(
+                $packageName,
+                $productId,
+                $purchaseToken,
+                new \Google_Service_AndroidPublisher_SubscriptionPurchasesAcknowledgeRequest(['developerPayload' => 'foo'])
+            );
+
+        $googlePlayAcknowledger = new Acknowledger($googleServiceAndroidPublisherMock, $packageName, $productId, $purchaseToken);
+
+        $googlePlayAcknowledger->acknowledge(Acknowledger::SUBSCRIPTION, 'foo');
+        $googlePlayAcknowledger->acknowledge(Acknowledger::PRODUCT, 'bar');
+    }
+}