diff --git a/documents/iin.md b/documents/iin.md
new file mode 100644
index 00000000..8fec6f73
--- /dev/null
+++ b/documents/iin.md
@@ -0,0 +1,123 @@
+### Iin
+
+### Token IIN API
+
+```java
+String tokenIin = "412345";
+
+Iin token = instance.iin.fetch(tokenIin);
+```
+
+**Parameters:**
+
+| Name       | Type   | Description                       |
+|------------|--------|-----------------------------------|
+| tokenIin*  | string | The token IIN.                    |
+
+**Response:**
+```json
+{
+  "iin": "412345",
+  "entity": "iin",
+  "network": "Visa",
+  "type": "credit",
+  "sub_type": "business",
+  "issuer_code": "HDFC",
+  "issuer_name": "HDFC Bank Ltd",
+  "international": false,
+  "is_tokenized": true,
+  "card_iin": "411111",
+  "emi":{
+     "available": true
+     },
+  "recurring": {
+     "available": true
+     },
+  "authentication_types": [
+   {
+       "type":"3ds"
+   },
+   {
+       "type":"otp"
+   }
+  ]
+}
+```
+-------------------------------------------------------------------------------------------------------
+
+### Fetch All IINs Supporting Native OTP
+
+```java
+JSONObject obj = new JSONObject();
+obj.put("flow","otp");
+
+Iin item = razorpayclient.iin.fetchList(obj);
+```
+
+**Parameters:**
+
+| Name       | Type   | Description                                                 |
+|------------|--------|-------------------------------------------------------------|
+| flow       | string | Authentication flow is Native OTP. Possible value is `otp`. |
+
+**Response:**
+```json
+{
+  "count": 24,
+  "iins": [
+    "512967",
+    "180005",
+    "401704",
+    "401806",
+    "123456",
+    "411111",
+    "123512967",
+    "180012305",
+    "401123704"
+  ]
+}
+```
+-------------------------------------------------------------------------------------------------------
+
+### Fetch All IINs with Business Sub-type
+
+```java
+JSONObject obj = new JSONObject();
+obj.put("sub_type","business");
+
+Iin item = razorpayclient.iin.fetchList(obj);
+```
+
+**Parameters:**
+
+| Name       | Type   | Description                                            |
+|------------|--------|--------------------------------------------------------|
+| sub_type   | string | The sub_type of the IIN. Possible value is `business`. |
+
+**Response:**
+```json
+{
+  "count": 24,
+  "iins": [
+    "512967",
+    "180005",
+    "401704",
+    "401806",
+    "607389",
+    "652203",
+    "414367",
+    "787878",
+    "123456",
+    "411111",
+    "123512967",
+    "180012305",
+    "401123704"
+  ]
+}
+```
+-------------------------------------------------------------------------------------------------------
+
+**PN: * indicates mandatory fields**
+<br>
+<br>
+**For reference click [here](https://razorpay.com/docs/api/payments/cards/iin-api/#iin-entity)**
\ No newline at end of file
diff --git a/src/main/java/com/razorpay/Constants.java b/src/main/java/com/razorpay/Constants.java
index d6dda79d..45ce56c0 100755
--- a/src/main/java/com/razorpay/Constants.java
+++ b/src/main/java/com/razorpay/Constants.java
@@ -170,6 +170,7 @@ public class Constants {
   static final String TOKEN     = "/token";
   static final String REVOKE     = "/revoke";
 
+  static final String IIN_FETCH_LIST = "iins/list";
   static final String DOCUMENTS = "/documents";
   static final String DOCUMENT_FETCH = "/documents/%s";
 
diff --git a/src/main/java/com/razorpay/EntityNameURLMapping.java b/src/main/java/com/razorpay/EntityNameURLMapping.java
index 88f76736..4316dcd9 100644
--- a/src/main/java/com/razorpay/EntityNameURLMapping.java
+++ b/src/main/java/com/razorpay/EntityNameURLMapping.java
@@ -10,7 +10,7 @@
  */
 
 public enum EntityNameURLMapping {
-  
+    IINS("iin"),
     INVOICES("invoice"),
     SETTLEMENTS("settlement"),
     PAYMENTS("payment"),
diff --git a/src/main/java/com/razorpay/IinClient.java b/src/main/java/com/razorpay/IinClient.java
index 9a86e621..425e7e40 100644
--- a/src/main/java/com/razorpay/IinClient.java
+++ b/src/main/java/com/razorpay/IinClient.java
@@ -1,5 +1,7 @@
 package com.razorpay;
 
+import org.json.JSONObject;
+
 public class IinClient extends ApiClient{
 
     IinClient(String auth) {
@@ -10,4 +12,7 @@ public Iin fetch(String id) throws RazorpayException {
         return get(Constants.VERSION, String.format(Constants.IIN_FETCH, id), null);
     }
 
+    public Iin fetchList(JSONObject request) throws RazorpayException {
+        return get(Constants.VERSION, String.format(Constants.IIN_FETCH_LIST), request);
+    }
 }
diff --git a/src/main/java/com/razorpay/Utils.java b/src/main/java/com/razorpay/Utils.java
index cc09683b..0beb2469 100644
--- a/src/main/java/com/razorpay/Utils.java
+++ b/src/main/java/com/razorpay/Utils.java
@@ -54,7 +54,6 @@ public static boolean verifySignature(String payload, String expectedSignature,
 
   public static String generateOnboardingSignature(JSONObject attributes, String secret) throws RazorpayException {
     String jsonString = attributes.toString();
-    System.out.println("data to encrypt" + jsonString);
     return encrypt(jsonString, secret);
   }
 
diff --git a/src/test/java/com/razorpay/IinClientTest.java b/src/test/java/com/razorpay/IinClientTest.java
index be35ae22..81ffc255 100644
--- a/src/test/java/com/razorpay/IinClientTest.java
+++ b/src/test/java/com/razorpay/IinClientTest.java
@@ -1,5 +1,7 @@
 package com.razorpay;
 
+import org.json.JSONArray;
+import org.json.JSONObject;
 import org.junit.Test;
 import org.mockito.InjectMocks;
 
@@ -54,4 +56,27 @@ public void fetch() throws RazorpayException {
             assertTrue(false);
         }
     }
+
+    @Test
+    public void fetchList() throws RazorpayException {
+
+        JSONObject request = new JSONObject();
+        request.put("flow","otp");
+
+        JSONObject mockedResponseJson = new JSONObject();
+        mockedResponseJson.put("count", 0);
+        mockedResponseJson.put("entity", "iin");
+        JSONArray iinArray = new JSONArray();
+        mockedResponseJson.put("iins", iinArray);
+
+        try {
+            mockResponseFromExternalClient(mockedResponseJson.toString());
+            mockResponseHTTPCodeFromExternalClient(200);
+            Iin fetch = iinClient.fetchList(request);
+            assertNotNull(fetch);
+            assertEquals(true,fetch.has("iins"));
+        } catch (IOException e) {
+            assertTrue(false);
+        }
+    }
 }