diff --git a/doc/registrant-api/v1/domain.md b/doc/registrant-api/v1/domain.md
index ec32772df..eeb1bfccc 100644
--- a/doc/registrant-api/v1/domain.md
+++ b/doc/registrant-api/v1/domain.md
@@ -17,58 +17,94 @@ Returns domains of the current registrant.
 HTTP/1.1 200
 Content-Type: application/json
 
-{
-  [
-    {
-      "id": "98d1083a-8863-4153-93e4-caee4a013535",
-      "name": "domain0.ee",
-      "registrar": {
-        "name": "Best Names",
-        "website": "example.com"
+[
+  {
+    "id":"98d1083a-8863-4153-93e4-caee4a013535",
+    "name":"domain0.ee",
+    "registrar":{
+      "name":"Best Names",
+      "website":"example.com"
+    },
+    "valid_to":"2016-09-09T09:11:14.861Z",
+    "registered_at":"2015-09-09T09:11:14.861Z",
+    "registrant":{
+      "name":"John Smith",
+      "id":"acadf23e-47c4-4606-8f67-76e071a1cca2"
+    },
+    "admin_contacts":[
+      {
+        "name":"John Smith",
+        "id":"62015e7d-42c8-4d68-8164-e9b71680fd95"
       },
-      "registered_at": "2015-09-09T09:11:14.861Z",
-      "valid_to": "2016-09-09T09:11:14.861Z",
-      "registrant_id": 1,
-      "transfer_code": "98oiewslkfkd",
-      "created_at": "2015-09-09T09:11:14.861Z",
-      "updated_at": "2015-09-09T09:11:14.860Z",
-      "name_dirty": "domain0.ee",
-      "name_puny": "domain0.ee",
-      "period": 1,
-      "period_unit": "y",
-      "creator_str": null,
-      "updator_str": null,
-      "legacy_id": null,
-      "legacy_registrar_id": null,
-      "legacy_registrant_id": null,
-      "outzone_at": "2016-09-24T09:11:14.861Z",
-      "delete_at": "2016-10-24T09:11:14.861Z",
-      "registrant_verification_asked_at": null,
-      "registrant_verification_token": null,
-      "locked_by_registrant_at": "2015-09-09T09:11:14.861Z",
-      "pending_json": {},
-      "force_delete_at": null,
-      "statuses": [
-        "ok"
-      ],
-      "nameservers": [
-        {
-          "hostname": "ns1.bestnames.test",
-          "ipv4": ["173.245.58.41"],
-          "ipv6": ["2400:cb00:2049:1::adf5:3a33"]
-        },
-        {
-          "hostname": "ns1.bestnames.test",
-          "ipv4": ["173.245.58.51"],
-          "ipv6": ["2400:cb00:2049:1::adf5:3b29"]
-        },
-      ],
-      "reserved": false,
-      "status_notes": {},
-      "statuses_backup": []
-    }
-  ]
-}
+      {
+        "name":"William Smith",
+        "id":"a041c5b6-7772-4fac-83cd-fbce3b2c8867"
+      }
+    ],
+    "tech_contacts":[
+      {
+        "name":"John Smith",
+        "id":"62015e7d-42c8-4d68-8164-e9b71680fd95"
+      },
+      {
+        "name":"William Smith",
+        "id":"a041c5b6-7772-4fac-83cd-fbce3b2c8867"
+      }
+    ],
+    "transfer_code":"98oiewslkfkd",
+    "created_at":"2015-09-09T09:11:14.861Z",
+    "updated_at":"2015-09-09T09:11:14.860Z",
+    "name_dirty":"domain0.ee",
+    "name_puny":"domain0.ee",
+    "period":1,
+    "period_unit":"y",
+    "creator_str":null,
+    "updator_str":null,
+    "legacy_id":null,
+    "legacy_registrar_id":null,
+    "legacy_registrant_id":null,
+    "outzone_at":"2016-09-24T09:11:14.861Z",
+    "delete_at":"2016-10-24T09:11:14.861Z",
+    "registrant_verification_asked_at":null,
+    "registrant_verification_token":null,
+    "locked_by_registrant_at":"2015-09-09T09:11:14.861Z",
+    "pending_json":{
+
+    },
+    "force_delete_at":null,
+    "statuses":[
+      "ok"
+    ],
+    "nameservers":[
+      {
+        "hostname":"ns1.bestnames.test",
+        "ipv4":[
+          "173.245.58.41"
+        ],
+        "ipv6":[
+          "2400:cb00:2049:1::adf5:3a33"
+        ]
+      },
+      {
+        "hostname":"ns1.bestnames.test",
+        "ipv4":[
+          "173.245.58.51"
+        ],
+        "ipv6":[
+          "2400:cb00:2049:1::adf5:3b29"
+        ]
+      },
+
+    ],
+    "reserved":false,
+    "status_notes":{
+
+    },
+    "statuses_backup":[
+
+    ]
+  }
+]
 ```
 
 #### Request
@@ -97,58 +133,94 @@ Content-Type: application/json
 HTTP/1.1 200
 Content-Type: application/json
 
-{
-  [
-    {
-      "id": "98d1083a-8863-4153-93e4-caee4a013535",
-      "name": "domain0.ee",
-      "registrar": {
-        "name": "Best Names",
-        "website": "example.com"
+[
+  {
+    "id":"98d1083a-8863-4153-93e4-caee4a013535",
+    "name":"domain0.ee",
+    "registrar":{
+      "name":"Best Names",
+      "website":"example.com"
+    },
+    "valid_to":"2016-09-09T09:11:14.861Z",
+    "registered_at":"2015-09-09T09:11:14.861Z",
+    "registrant":{
+      "name":"John Smith",
+      "id":"acadf23e-47c4-4606-8f67-76e071a1cca2"
+    },
+    "admin_contacts":[
+      {
+        "name":"John Smith",
+        "id":"62015e7d-42c8-4d68-8164-e9b71680fd95"
       },
-      "valid_to": "2016-09-09T09:11:14.861Z",
-      "registered_at": "2015-09-09T09:11:14.861Z",
-      "registrant_id": 1,
-      "transfer_code": "98oiewslkfkd",
-      "created_at": "2015-09-09T09:11:14.861Z",
-      "updated_at": "2015-09-09T09:11:14.860Z",
-      "name_dirty": "domain0.ee",
-      "name_puny": "domain0.ee",
-      "period": 1,
-      "period_unit": "y",
-      "creator_str": null,
-      "updator_str": null,
-      "legacy_id": null,
-      "legacy_registrar_id": null,
-      "legacy_registrant_id": null,
-      "outzone_at": "2016-09-24T09:11:14.861Z",
-      "delete_at": "2016-10-24T09:11:14.861Z",
-      "registrant_verification_asked_at": null,
-      "registrant_verification_token": null,
-      "locked_by_registrant_at": "2015-09-09T09:11:14.861Z",
-      "pending_json": {},
-      "force_delete_at": null,
-      "statuses": [
-        "ok"
-      ],
-      "nameservers": [
-        {
-          "hostname": "ns1.bestnames.test",
-          "ipv4": ["173.245.58.41"],
-          "ipv6": ["2400:cb00:2049:1::adf5:3a33"]
-        },
-        {
-          "hostname": "ns1.bestnames.test",
-          "ipv4": ["173.245.58.51"],
-          "ipv6": ["2400:cb00:2049:1::adf5:3b29"]
-        },
-      ],
-      "reserved": false,
-      "status_notes": {},
-      "statuses_backup": []
-    }
-  ]
-}
+      {
+        "name":"William Smith",
+        "id":"a041c5b6-7772-4fac-83cd-fbce3b2c8867"
+      }
+    ],
+    "tech_contacts":[
+      {
+        "name":"John Smith",
+        "id":"62015e7d-42c8-4d68-8164-e9b71680fd95"
+      },
+      {
+        "name":"William Smith",
+        "id":"a041c5b6-7772-4fac-83cd-fbce3b2c8867"
+      }
+    ],
+    "transfer_code":"98oiewslkfkd",
+    "created_at":"2015-09-09T09:11:14.861Z",
+    "updated_at":"2015-09-09T09:11:14.860Z",
+    "name_dirty":"domain0.ee",
+    "name_puny":"domain0.ee",
+    "period":1,
+    "period_unit":"y",
+    "creator_str":null,
+    "updator_str":null,
+    "legacy_id":null,
+    "legacy_registrar_id":null,
+    "legacy_registrant_id":null,
+    "outzone_at":"2016-09-24T09:11:14.861Z",
+    "delete_at":"2016-10-24T09:11:14.861Z",
+    "registrant_verification_asked_at":null,
+    "registrant_verification_token":null,
+    "locked_by_registrant_at":"2015-09-09T09:11:14.861Z",
+    "pending_json":{
+
+    },
+    "force_delete_at":null,
+    "statuses":[
+      "ok"
+    ],
+    "nameservers":[
+      {
+        "hostname":"ns1.bestnames.test",
+        "ipv4":[
+          "173.245.58.41"
+        ],
+        "ipv6":[
+          "2400:cb00:2049:1::adf5:3a33"
+        ]
+      },
+      {
+        "hostname":"ns1.bestnames.test",
+        "ipv4":[
+          "173.245.58.51"
+        ],
+        "ipv6":[
+          "2400:cb00:2049:1::adf5:3b29"
+        ]
+      },
+
+    ],
+    "reserved":false,
+    "status_notes":{
+
+    },
+    "statuses_backup":[
+
+    ]
+  }
+]
 ```
 
 ## GET api/v1/registrant/domains/$UUID
@@ -171,52 +243,89 @@ HTTP/1.1 200
 Content-Type: application/json
 
 {
-  "id": "98d1083a-8863-4153-93e4-caee4a013535",
-  "name": "domain0.ee",
-  "registrar": {
-     "name": "Best Names",
-     "website": "example.com"
+  "id":"98d1083a-8863-4153-93e4-caee4a013535",
+  "name":"domain0.ee",
+  "registrar":{
+    "name":"Best Names",
+    "website":"example.com"
   },
-  "registered_at": "2015-09-09T09:11:14.861Z",
-  "valid_to": "2016-09-09T09:11:14.861Z",
-  "registrant_id": 1,
-  "transfer_code": "98oiewslkfkd",
-  "created_at": "2015-09-09T09:11:14.861Z",
-  "updated_at": "2015-09-09T09:11:14.860Z",
-  "name_dirty": "domain0.ee",
-  "name_puny": "domain0.ee",
-  "period": 1,
-  "period_unit": "y",
-  "creator_str": null,
-  "updator_str": null,
-  "legacy_id": null,
-  "legacy_registrar_id": null,
-  "legacy_registrant_id": null,
-  "outzone_at": "2016-09-24T09:11:14.861Z",
-  "delete_at": "2016-10-24T09:11:14.861Z",
-  "registrant_verification_asked_at": null,
-  "registrant_verification_token": null,
-  "locked_by_registrant_at": "2015-09-09T09:11:14.861Z",
-  "pending_json": {},
-  "force_delete_at": null,
-  "statuses": [
+  "valid_to":"2016-09-09T09:11:14.861Z",
+  "registered_at":"2015-09-09T09:11:14.861Z",
+  "registrant":{
+    "name":"John Smith",
+    "id":"acadf23e-47c4-4606-8f67-76e071a1cca2"
+  },
+  "admin_contacts":[
+    {
+      "name":"John Smith",
+      "id":"62015e7d-42c8-4d68-8164-e9b71680fd95"
+    },
+    {
+      "name":"William Smith",
+      "id":"a041c5b6-7772-4fac-83cd-fbce3b2c8867"
+    }
+  ],
+  "tech_contacts":[
+    {
+      "name":"John Smith",
+      "id":"62015e7d-42c8-4d68-8164-e9b71680fd95"
+    },
+    {
+      "name":"William Smith",
+      "id":"a041c5b6-7772-4fac-83cd-fbce3b2c8867"
+    }
+  ],
+  "transfer_code":"98oiewslkfkd",
+  "created_at":"2015-09-09T09:11:14.861Z",
+  "updated_at":"2015-09-09T09:11:14.860Z",
+  "name_dirty":"domain0.ee",
+  "name_puny":"domain0.ee",
+  "period":1,
+  "period_unit":"y",
+  "creator_str":null,
+  "updator_str":null,
+  "legacy_id":null,
+  "legacy_registrar_id":null,
+  "legacy_registrant_id":null,
+  "outzone_at":"2016-09-24T09:11:14.861Z",
+  "delete_at":"2016-10-24T09:11:14.861Z",
+  "registrant_verification_asked_at":null,
+  "registrant_verification_token":null,
+  "locked_by_registrant_at":"2015-09-09T09:11:14.861Z",
+  "pending_json":{
+
+  },
+  "force_delete_at":null,
+  "statuses":[
     "ok"
   ],
-  "nameservers": [
+  "nameservers":[
     {
-      "hostname": "ns1.bestnames.test",
-      "ipv4": ["173.245.58.41"],
-      "ipv6": ["2400:cb00:2049:1::adf5:3a33"]
+      "hostname":"ns1.bestnames.test",
+      "ipv4":[
+        "173.245.58.41"
+      ],
+      "ipv6":[
+        "2400:cb00:2049:1::adf5:3a33"
+      ]
     },
     {
-      "hostname": "ns1.bestnames.test",
-      "ipv4": ["173.245.58.51"],
-      "ipv6": ["2400:cb00:2049:1::adf5:3b29"]
-    },
+      "hostname":"ns1.bestnames.test",
+      "ipv4":[
+        "173.245.58.51"
+      ],
+      "ipv6":[
+        "2400:cb00:2049:1::adf5:3b29"
+      ]
+    }
   ],
-  "reserved": false,
-  "status_notes": {},
-  "statuses_backup": []
+  "reserved":false,
+  "status_notes":{
+
+  },
+  "statuses_backup":[
+
+  ]
 }
 ```
 
diff --git a/doc/registrant-api/v1/registry_lock.md b/doc/registrant-api/v1/registry_lock.md
index 1b0dd828b..553c7b28e 100644
--- a/doc/registrant-api/v1/registry_lock.md
+++ b/doc/registrant-api/v1/registry_lock.md
@@ -19,54 +19,91 @@ HTTP/1.1 200
 Content-Type: application/json
 
 {
-  "id": "98d1083a-8863-4153-93e4-caee4a013535",
-  "name": "domain0.ee",
-  "registrar": {
-     "name": "Best Names",
-     "website": "example.com"
+  "id":"98d1083a-8863-4153-93e4-caee4a013535",
+  "name":"domain0.ee",
+  "registrar":{
+    "name":"Best Names",
+    "website":"example.com"
   },
-  "registered_at": "2015-09-09T09:11:14.861Z",
-  "valid_to": "2016-09-09T09:11:14.861Z",
-  "registrant_id": 1,
-  "transfer_code": "98oiewslkfkd",
-  "created_at": "2015-09-09T09:11:14.861Z",
-  "updated_at": "2015-09-09T09:11:14.860Z",
-  "name_dirty": "domain0.ee",
-  "name_puny": "domain0.ee",
-  "period": 1,
-  "period_unit": "y",
-  "creator_str": null,
-  "updator_str": null,
-  "legacy_id": null,
-  "legacy_registrar_id": null,
-  "legacy_registrant_id": null,
-  "outzone_at": "2016-09-24T09:11:14.861Z",
-  "delete_at": "2016-10-24T09:11:14.861Z",
-  "registrant_verification_asked_at": null,
-  "registrant_verification_token": null,
-  "locked_by_registrant_at": "2015-09-09T09:11:14.861Z",
-  "pending_json": {},
-  "force_delete_at": null,
-  "statuses": [
+  "registrant":{
+    "name":"John Smith",
+    "id":"acadf23e-47c4-4606-8f67-76e071a1cca2"
+  },
+  "admin_contacts":[
+    {
+      "name":"John Smith",
+      "id":"62015e7d-42c8-4d68-8164-e9b71680fd95"
+    },
+    {
+      "name":"William Smith",
+      "id":"a041c5b6-7772-4fac-83cd-fbce3b2c8867"
+    }
+  ],
+  "tech_contacts":[
+    {
+      "name":"John Smith",
+      "id":"62015e7d-42c8-4d68-8164-e9b71680fd95"
+    },
+    {
+      "name":"William Smith",
+      "id":"a041c5b6-7772-4fac-83cd-fbce3b2c8867"
+    }
+  ],
+  "registered_at":"2015-09-09T09:11:14.861Z",
+  "valid_to":"2016-09-09T09:11:14.861Z",
+  "transfer_code":"98oiewslkfkd",
+  "created_at":"2015-09-09T09:11:14.861Z",
+  "updated_at":"2015-09-09T09:11:14.860Z",
+  "name_dirty":"domain0.ee",
+  "name_puny":"domain0.ee",
+  "period":1,
+  "period_unit":"y",
+  "creator_str":null,
+  "updator_str":null,
+  "legacy_id":null,
+  "legacy_registrar_id":null,
+  "legacy_registrant_id":null,
+  "outzone_at":"2016-09-24T09:11:14.861Z",
+  "delete_at":"2016-10-24T09:11:14.861Z",
+  "registrant_verification_asked_at":null,
+  "registrant_verification_token":null,
+  "locked_by_registrant_at":"2015-09-09T09:11:14.861Z",
+  "pending_json":{
+
+  },
+  "force_delete_at":null,
+  "statuses":[
     "serverUpdateProhibited",
     "serverDeleteProhibited",
     "serverTransferProhibited"
   ],
-  "nameservers": [
+  "nameservers":[
     {
-      "hostname": "ns1.bestnames.test",
-      "ipv4": ["173.245.58.41"],
-      "ipv6": ["2400:cb00:2049:1::adf5:3a33"]
+      "hostname":"ns1.bestnames.test",
+      "ipv4":[
+        "173.245.58.41"
+      ],
+      "ipv6":[
+        "2400:cb00:2049:1::adf5:3a33"
+      ]
     },
     {
-      "hostname": "ns1.bestnames.test",
-      "ipv4": ["173.245.58.51"],
-      "ipv6": ["2400:cb00:2049:1::adf5:3b29"]
-    },
+      "hostname":"ns1.bestnames.test",
+      "ipv4":[
+        "173.245.58.51"
+      ],
+      "ipv6":[
+        "2400:cb00:2049:1::adf5:3b29"
+      ]
+    }
   ],
-  "reserved": false,
-  "status_notes": {},
-  "statuses_backup": []
+  "reserved":false,
+  "status_notes":{
+
+  },
+  "statuses_backup":[
+
+  ]
 }
 ```
 
@@ -127,52 +164,89 @@ HTTP/1.1 200
 Content-Type: application/json
 
 {
-  "id": "98d1083a-8863-4153-93e4-caee4a013535",
-  "name": "domain0.ee",
-  "registrar": {
-     "name": "Best Names",
-     "website": "example.com"
+  "id":"98d1083a-8863-4153-93e4-caee4a013535",
+  "name":"domain0.ee",
+  "registrar":{
+    "name":"Best Names",
+    "website":"example.com"
   },
-  "registered_at": "2015-09-09T09:11:14.861Z",
-  "valid_to": "2016-09-09T09:11:14.861Z",
-  "registrant_id": 1,
-  "transfer_code": "98oiewslkfkd",
-  "created_at": "2015-09-09T09:11:14.861Z",
-  "updated_at": "2015-09-09T09:11:14.860Z",
-  "name_dirty": "domain0.ee",
-  "name_puny": "domain0.ee",
-  "period": 1,
-  "period_unit": "y",
-  "creator_str": null,
-  "updator_str": null,
-  "legacy_id": null,
-  "legacy_registrar_id": null,
-  "legacy_registrant_id": null,
-  "outzone_at": "2016-09-24T09:11:14.861Z",
-  "delete_at": "2016-10-24T09:11:14.861Z",
-  "registrant_verification_asked_at": null,
-  "registrant_verification_token": null,
-  "locked_by_registrant_at": null,
-  "pending_json": {},
-  "force_delete_at": null,
-  "statuses": [
+  "registered_at":"2015-09-09T09:11:14.861Z",
+  "valid_to":"2016-09-09T09:11:14.861Z",
+  "registrant":{
+    "name":"John Smith",
+    "id":"acadf23e-47c4-4606-8f67-76e071a1cca2"
+  },
+  "admin_contacts":[
+    {
+      "name":"John Smith",
+      "id":"62015e7d-42c8-4d68-8164-e9b71680fd95"
+    },
+    {
+      "name":"William Smith",
+      "id":"a041c5b6-7772-4fac-83cd-fbce3b2c8867"
+    }
+  ],
+  "tech_contacts":[
+    {
+      "name":"John Smith",
+      "id":"62015e7d-42c8-4d68-8164-e9b71680fd95"
+    },
+    {
+      "name":"William Smith",
+      "id":"a041c5b6-7772-4fac-83cd-fbce3b2c8867"
+    }
+  ],
+  "transfer_code":"98oiewslkfkd",
+  "created_at":"2015-09-09T09:11:14.861Z",
+  "updated_at":"2015-09-09T09:11:14.860Z",
+  "name_dirty":"domain0.ee",
+  "name_puny":"domain0.ee",
+  "period":1,
+  "period_unit":"y",
+  "creator_str":null,
+  "updator_str":null,
+  "legacy_id":null,
+  "legacy_registrar_id":null,
+  "legacy_registrant_id":null,
+  "outzone_at":"2016-09-24T09:11:14.861Z",
+  "delete_at":"2016-10-24T09:11:14.861Z",
+  "registrant_verification_asked_at":null,
+  "registrant_verification_token":null,
+  "locked_by_registrant_at":null,
+  "pending_json":{
+
+  },
+  "force_delete_at":null,
+  "statuses":[
     "ok"
   ],
-  "nameservers": [
+  "nameservers":[
     {
-      "hostname": "ns1.bestnames.test",
-      "ipv4": ["173.245.58.41"],
-      "ipv6": ["2400:cb00:2049:1::adf5:3a33"]
+      "hostname":"ns1.bestnames.test",
+      "ipv4":[
+        "173.245.58.41"
+      ],
+      "ipv6":[
+        "2400:cb00:2049:1::adf5:3a33"
+      ]
     },
     {
-      "hostname": "ns1.bestnames.test",
-      "ipv4": ["173.245.58.51"],
-      "ipv6": ["2400:cb00:2049:1::adf5:3b29"]
-    },
+      "hostname":"ns1.bestnames.test",
+      "ipv4":[
+        "173.245.58.51"
+      ],
+      "ipv6":[
+        "2400:cb00:2049:1::adf5:3b29"
+      ]
+    }
   ],
-  "reserved": false,
-  "status_notes": {},
-  "statuses_backup": []
+  "reserved":false,
+  "status_notes":{
+
+  },
+  "statuses_backup":[
+
+  ]
 }
 ```
 
diff --git a/lib/serializers/registrant_api/domain.rb b/lib/serializers/registrant_api/domain.rb
index 5a91dcde8..d6adf61ee 100644
--- a/lib/serializers/registrant_api/domain.rb
+++ b/lib/serializers/registrant_api/domain.rb
@@ -9,49 +9,71 @@ module Serializers
 
       def to_json
         {
-          id: @domain.uuid,
-          name: @domain.name,
+          id: domain.uuid,
+          name: domain.name,
           registrar: {
-            name: @domain.registrar.name,
-            website: @domain.registrar.website,
+            name: domain.registrar.name,
+            website: domain.registrar.website,
           },
-          registered_at: @domain.registered_at,
-          valid_to: @domain.valid_to,
-          created_at: @domain.created_at,
-          updated_at: @domain.updated_at,
-          registrant: @domain.registrant_name,
-          transfer_code: @domain.transfer_code,
-          name_dirty: @domain.name_dirty,
-          name_puny: @domain.name_puny,
-          period: @domain.period,
-          period_unit: @domain.period_unit,
-          creator_str: @domain.creator_str,
-          updator_str: @domain.updator_str,
-          legacy_id: @domain.legacy_id,
-          legacy_registrar_id: @domain.legacy_registrar_id,
-          legacy_registrant_id: @domain.legacy_registrant_id,
-          outzone_at: @domain.outzone_at,
-          delete_at: @domain.delete_at,
-          registrant_verification_asked_at: @domain.registrant_verification_asked_at,
-          registrant_verification_token: @domain.registrant_verification_token,
-          pending_json: @domain.pending_json,
-          force_delete_at: @domain.force_delete_at,
-          statuses: @domain.statuses,
-          locked_by_registrant_at: @domain.locked_by_registrant_at,
-          reserved: @domain.reserved,
-          status_notes: @domain.status_notes,
+          registered_at: domain.registered_at,
+          valid_to: domain.valid_to,
+          created_at: domain.created_at,
+          updated_at: domain.updated_at,
+          registrant: {
+            name: domain.registrant.name,
+            id: domain.registrant.uuid,
+          },
+          tech_contacts: contacts(:tech),
+          admin_contacts: contacts(:admin),
+          transfer_code: domain.transfer_code,
+          name_dirty: domain.name_dirty,
+          name_puny: domain.name_puny,
+          period: domain.period,
+          period_unit: domain.period_unit,
+          creator_str: domain.creator_str,
+          updator_str: domain.updator_str,
+          legacy_id: domain.legacy_id,
+          legacy_registrar_id: domain.legacy_registrar_id,
+          legacy_registrant_id: domain.legacy_registrant_id,
+          outzone_at: domain.outzone_at,
+          delete_at: domain.delete_at,
+          registrant_verification_asked_at: domain.registrant_verification_asked_at,
+          registrant_verification_token: domain.registrant_verification_token,
+          pending_json: domain.pending_json,
+          force_delete_at: domain.force_delete_at,
+          statuses: domain.statuses,
+          locked_by_registrant_at: domain.locked_by_registrant_at,
+          reserved: domain.reserved,
+          status_notes: domain.status_notes,
           nameservers: nameservers,
         }
       end
 
       private
 
-      def nameservers
-        array_of_nameservers = Array.new
+      def contacts(type)
+        contact_pool = begin
+                         if type == :tech
+                           domain.tech_contacts
+                         elsif type == :admin
+                           domain.admin_contacts
+                         end
+                       end
 
-        @domain.nameservers.map do |nameserver|
-          array_of_nameservers.push({ hostname: nameserver.hostname, ipv4: nameserver.ipv4,
-                                      ipv6: nameserver.ipv6 })
+        array_of_contacts = []
+        contact_pool.map do |contact|
+          array_of_contacts.push(name: contact.name, id: contact.uuid)
+        end
+
+        array_of_contacts
+      end
+
+      def nameservers
+        array_of_nameservers = []
+
+        domain.nameservers.map do |nameserver|
+          array_of_nameservers.push(hostname: nameserver.hostname, ipv4: nameserver.ipv4,
+                                    ipv6: nameserver.ipv6)
         end
 
         array_of_nameservers
diff --git a/test/integration/api/registrant/registrant_api_domains_test.rb b/test/integration/api/registrant/registrant_api_domains_test.rb
index 51ca403b0..9720373a1 100644
--- a/test/integration/api/registrant/registrant_api_domains_test.rb
+++ b/test/integration/api/registrant/registrant_api_domains_test.rb
@@ -30,6 +30,11 @@ class RegistrantApiDomainsTest < ApplicationIntegrationTest
 
     assert_equal('hospital.test', domain[:name])
     assert_equal('5edda1a5-3548-41ee-8b65-6d60daf85a37', domain[:id])
+    assert_equal({name: 'John', id: 'eb2f2766-b44c-4e14-9f16-32ab1a7cb957'}, domain[:registrant])
+    assert_equal([{name: 'John', id: 'eb2f2766-b44c-4e14-9f16-32ab1a7cb957'}],
+                 domain[:admin_contacts])
+    assert_equal([{name: 'John', id: 'eb2f2766-b44c-4e14-9f16-32ab1a7cb957'}],
+                 domain[:tech_contacts])
     assert_equal({ name: 'Good Names', website: nil }, domain[:registrar])
     assert_equal([], domain[:nameservers])
     assert(domain.has_key?(:locked_by_registrant_at))
diff --git a/test/integration/api/registrant/registrant_api_registry_locks_test.rb b/test/integration/api/registrant/registrant_api_registry_locks_test.rb
index b028acc90..d35952a73 100644
--- a/test/integration/api/registrant/registrant_api_registry_locks_test.rb
+++ b/test/integration/api/registrant/registrant_api_registry_locks_test.rb
@@ -130,6 +130,11 @@ class RegistrantApiRegistryLocksTest < ApplicationIntegrationTest
     response_json = JSON.parse(response.body, symbolize_names: true)
 
     assert_equal({ name: 'Best Names', website: 'bestnames.test' }, response_json[:registrar])
+    assert_equal({name: 'John', id: 'eb2f2766-b44c-4e14-9f16-32ab1a7cb957'}, response_json[:registrant])
+    assert_equal([{name: 'Jane', id: '9db3de62-2414-4487-bee2-d5c155567768'}], response_json[:admin_contacts])
+    assert_equal([{name: 'William', id: '0aa54704-d6f7-4ca9-b8ca-2827d9a4e4eb'},
+                  {name: 'Acme Ltd', id: 'f1dd365c-5be9-4b3d-a44e-3fa002465e4d'}],
+                 response_json[:tech_contacts])
     assert_equal(
       [{hostname: 'ns1.bestnames.test', ipv4: ['192.0.2.1'], ipv6: ['2001:db8::1']},
        {hostname: 'ns2.bestnames.test', ipv4: ['192.0.2.2'], ipv6: ['2001:db8::2']}].to_set,
diff --git a/test/lib/serializers/registrant_api/domain_test.rb b/test/lib/serializers/registrant_api/domain_test.rb
index 2408283be..bddb0efd7 100644
--- a/test/lib/serializers/registrant_api/domain_test.rb
+++ b/test/lib/serializers/registrant_api/domain_test.rb
@@ -28,6 +28,20 @@ class SerializersRegistrantApiDomainTest < ApplicationIntegrationTest
     assert_equal({name: 'Best Names', website: 'bestnames.test' }, @json[:registrar])
   end
 
+  def test_returns_registrant_name_and_uuid
+    assert_equal({name: 'John', id: 'eb2f2766-b44c-4e14-9f16-32ab1a7cb957'},
+                 @json[:registrant])
+  end
+
+  def test_returns_contacts_name_and_uuid
+    assert_equal([{name: 'John', id: 'eb2f2766-b44c-4e14-9f16-32ab1a7cb957'},
+                  {name: 'William', id: '0aa54704-d6f7-4ca9-b8ca-2827d9a4e4eb'}].to_set,
+                 @json[:admin_contacts].to_set)
+
+    assert_equal([{name: 'William', id: '0aa54704-d6f7-4ca9-b8ca-2827d9a4e4eb'}].to_set,
+                 @json[:tech_contacts].to_set)
+  end
+
   def test_returns_nameserver_hostnames_or_an_empty_array
     expected_nameserver_1 = {
       hostname: 'ns1.bestnames.test',
@@ -53,8 +67,8 @@ class SerializersRegistrantApiDomainTest < ApplicationIntegrationTest
 
   def test_other_fields_are_also_present
     keys = %i[id name registrar registered_at valid_to created_at updated_at
-              registrant transfer_code name_dirty name_puny period period_unit
-              creator_str updator_str legacy_id legacy_registrar_id legacy_registrant_id
+              registrant tech_contacts admin_contacts transfer_code name_dirty name_puny period
+              period_unit creator_str updator_str legacy_id legacy_registrar_id legacy_registrant_id
               outzone_at delete_at registrant_verification_asked_at
               registrant_verification_token pending_json force_delete_at statuses
               locked_by_registrant_at reserved status_notes nameservers]