diff --git a/README.md b/README.md
index 2a22637..b456352 100644
--- a/README.md
+++ b/README.md
@@ -75,6 +75,8 @@ $billingParams = [
         'zip' => '11231',
         'country' => 'EG',
         'email' => 'example@company.com',
+        'phone' => '+966000000000',
+        'custref' => 'user_id_1234' // The user's unique system ID to remember his card
     ];
 
 return $telrManager->pay('ORDER_ID_GOES_HERE', 'TOTAL_AMOUNT', 'DESCRIPTION ...', $billingParams)->redirect();
@@ -86,4 +88,4 @@ And on telr callback **(Success|Cancel|Declined)** to handle response put the fo
 ```php
 $telrManager = new \TelrGateway\TelrManager();
 $telrManager->handleTransactionResponse($request);
-```
\ No newline at end of file
+```
diff --git a/src/CreateTelrRequest.php b/src/CreateTelrRequest.php
index 5d665db..be9c942 100644
--- a/src/CreateTelrRequest.php
+++ b/src/CreateTelrRequest.php
@@ -368,6 +368,42 @@ public function getLangCode()
         return data_get($this->data, 'ivp_lang', null);
     }
 
+    /**
+     * @return mixed
+     */
+    public function getBillingCustref()
+    {
+        return data_get($this->data, 'bill_custref', null);
+    }
+
+    /**
+     * @param $custref
+     * @return $this
+     */
+    public function setBillingCustref($custref)
+    {
+        $this->data['bill_custref'] = $custref;
+        return $this;
+    }
+
+    /**
+     * @return mixed
+     */
+    public function getBillingPhone()
+    {
+        return data_get($this->data, 'bill_phone', null);
+    }
+
+    /**
+     * @param $phone
+     * @return $this
+     */
+    public function setBillingPhone($phone)
+    {
+        $this->data['bill_phone'] = $phone;
+
+        return $this;
+    }
     /**
      * Append order id to URL
      *
@@ -412,6 +448,8 @@ public function toArray()
             'bill_zip' => $this->getBillingZip(),
             'bill_country' => $this->getBillingCountry(),
             'bill_email' => $this->getBillingEmail(),
+            'bill_custref' => $this->getBillingCustref(),
+            'bill_phone' => $this->getBillingPhone(),
         ];
     }
 }