diff --git a/src/Omnipay/DataCash/Gateway.php b/src/Omnipay/DataCash/Gateway.php
index f8bdd0e..80a914a 100644
--- a/src/Omnipay/DataCash/Gateway.php
+++ b/src/Omnipay/DataCash/Gateway.php
@@ -2,8 +2,6 @@
 
 namespace Omnipay\DataCash;
 
-use Omnipay\DataCash\Message\CompletePurchaseRequest;
-use Omnipay\DataCash\Message\PurchaseRequest;
 use Omnipay\Common\AbstractGateway;
 
 /**
@@ -20,11 +18,11 @@ public function getName()
 
     public function getDefaultParameters()
     {
-        return array(
+        return [
             'merchantId' => '',
             'password' => '',
-            'testMode' => false
-        );
+            'testMode' => false,
+        ];
     }
 
     public function getMerchantId()
@@ -47,18 +45,23 @@ public function setPassword($value)
         return $this->setParameter('password', $value);
     }
 
-    public function purchase(array $parameters = array())
+    public function purchase(array $parameters = [])
     {
         return $this->createRequest('\Omnipay\DataCash\Message\PurchaseRequest', $parameters);
     }
 
-    public function completePurchase(array $parameters = array())
+    public function completePurchase(array $parameters = [])
     {
         return $this->createRequest('\Omnipay\DataCash\Message\CompletePurchaseRequest', $parameters);
     }
 
-    public function refund(array $parameters = array())
+    public function refund(array $parameters = [])
     {
         return $this->createRequest('\Omnipay\DataCash\Message\RefundRequest', $parameters);
     }
+
+    public function query(array $parameters = [])
+    {
+        return $this->createRequest('\Omnipay\DataCash\Message\QueryRequest', $parameters);
+    }
 }
diff --git a/src/Omnipay/DataCash/Message/QueryRequest.php b/src/Omnipay/DataCash/Message/QueryRequest.php
new file mode 100644
index 0000000..6e5757d
--- /dev/null
+++ b/src/Omnipay/DataCash/Message/QueryRequest.php
@@ -0,0 +1,70 @@
+<?php
+
+namespace Omnipay\DataCash\Message;
+
+use Omnipay\Common\Exception\InvalidResponseException;
+use SimpleXMLElement;
+use Omnipay\Common\Message\AbstractRequest;
+
+/**
+ * DataCash Refund Request
+ */
+class QueryRequest extends AbstractRequest
+{
+    protected $liveEndpoint = 'https://mars.transaction.datacash.com/Transaction';
+    protected $testEndpoint = 'https://testserver.datacash.com/Transaction';
+
+    public function getMerchantId()
+    {
+        return $this->getParameter('merchantId');
+    }
+
+    public function setMerchantId($value)
+    {
+        return $this->setParameter('merchantId', $value);
+    }
+
+    public function getPassword()
+    {
+        return $this->getParameter('password');
+    }
+
+    public function setPassword($value)
+    {
+        return $this->setParameter('password', $value);
+    }
+
+    public function getData()
+    {
+        $this->validate('transactionReference');
+
+        $data = new SimpleXMLElement('<Request/>');
+
+        $data->Authentication->client = $this->getMerchantId();
+        $data->Authentication->password = $this->getPassword();
+
+        $data->Transaction->HistoricTxn->reference = $this->getTransactionReference();
+        $data->Transaction->HistoricTxn->method = 'query';
+
+        return $data;
+    }
+
+    public function getEndpoint()
+    {
+        return $this->getTestMode() ? $this->testEndpoint : $this->liveEndpoint;
+    }
+
+    /**
+     * @param SimpleXMLElement $data
+     * @return \Omnipay\Common\Message\ResponseInterface|Response
+     * @throws InvalidResponseException
+     */
+    public function sendData($data)
+    {
+        // post to DataCash
+        $xml = $data->saveXML();
+        $httpResponse = $this->httpClient->post($this->getEndpoint(), null, $xml)->send();
+
+        return $this->response = new Response($this, $httpResponse->getBody());
+    }
+}
diff --git a/tests/Omnipay/DataCash/Message/QueryResponseTest.php b/tests/Omnipay/DataCash/Message/QueryResponseTest.php
new file mode 100644
index 0000000..068dfd5
--- /dev/null
+++ b/tests/Omnipay/DataCash/Message/QueryResponseTest.php
@@ -0,0 +1,27 @@
+<?php
+
+namespace Omnipay\DataCash\Message;
+
+use Omnipay\Tests\TestCase;
+
+class QueryResponseTest extends TestCase
+{
+    public function testQuerySuccess()
+    {
+        $httpResponse = $this->getMockHttpResponse('QuerySuccess.txt');
+        $response = new Response($this->getMockRequest(), $httpResponse->getBody());
+
+        $this->assertTrue($response->isSuccessful());
+        $this->assertEquals('123456', $response->getData()->QueryTxnResult->authcode);
+        $this->assertSame('ACCEPTED', $response->getMessage());
+    }
+
+    public function testQueryFailure()
+    {
+        $httpResponse = $this->getMockHttpResponse('QueryFailure.txt');
+        $response = new Response($this->getMockRequest(), $httpResponse->getBody());
+
+        $this->assertFalse($response->isSuccessful());
+        $this->assertSame('Invalid query ref', $response->getMessage());
+    }
+}
diff --git a/tests/Omnipay/DataCash/Mock/QueryFailure.txt b/tests/Omnipay/DataCash/Mock/QueryFailure.txt
new file mode 100644
index 0000000..45379cb
--- /dev/null
+++ b/tests/Omnipay/DataCash/Mock/QueryFailure.txt
@@ -0,0 +1,17 @@
+HTTP/1.1 200 OK
+Cache-Control: private, max-age=0
+Content-Length: 944
+Content-Type: text/xml; charset=utf-8
+Node: VENUS
+X-Powered-By: ASP.NET
+X-AspNet-Version: 4.0.30319
+Date: Fri, 15 Feb 2013 14:10:53 GMT
+
+<?xml version="1.0" encoding="utf-8"?>
+<Response>
+    <datacash_reference>3100108890691001</datacash_reference>
+    <mode>LIVE</mode>
+    <reason>Invalid query ref</reason>
+    <status>22</status>
+    <time>1540994766</time>
+</Response>
\ No newline at end of file
diff --git a/tests/Omnipay/DataCash/Mock/QuerySuccess.txt b/tests/Omnipay/DataCash/Mock/QuerySuccess.txt
new file mode 100644
index 0000000..27568c8
--- /dev/null
+++ b/tests/Omnipay/DataCash/Mock/QuerySuccess.txt
@@ -0,0 +1,36 @@
+HTTP/1.1 200 OK
+Cache-Control: private, max-age=0
+Content-Length: 944
+Content-Type: text/xml; charset=utf-8
+Node: VENUS
+X-Powered-By: ASP.NET
+X-AspNet-Version: 4.0.30319
+Date: Fri, 15 Feb 2013 14:10:53 GMT
+
+<?xml version="1.0" encoding="utf-8"?>
+<Response>
+    <QueryTxnResult>
+        <Card>
+            <card_category>Personal</card_category>
+            <country>gbr</country>
+            <expirydate>12/21</expirydate>
+            <issuer>Acme Bank</issuer>
+            <pan>444433******1111</pan>
+            <scheme>VISA</scheme>
+        </Card>
+        <acquirer>Mickeycard</acquirer>
+        <authcode>123456</authcode>
+        <datacash_reference>3000001234567898</datacash_reference>
+        <environment>ecomm</environment>
+        <fulfill_date>2018-10-15 18:41:06</fulfill_date>
+        <merchant_reference>ABCDEFG12345</merchant_reference>
+        <reason>ACCEPTED</reason>
+        <sent>Settled</sent>
+        <status>1</status>
+        <transaction_date>2018-10-14 22:41:06</transaction_date>
+    </QueryTxnResult>
+    <mode>LIVE</mode>
+    <reason>ACCEPTED</reason>
+    <status>1</status>
+    <time>1540994766</time>
+</Response>
\ No newline at end of file