diff --git a/src/user/contact.ts b/src/user/contact.ts
index 3263e58abaaed644341cfc891ad801a1c2e26109..b18e62b86f2854beb695fb495124d9e7fd429d50 100644
--- a/src/user/contact.ts
+++ b/src/user/contact.ts
@@ -257,19 +257,15 @@ export class Contact extends Accessory implements Sayable {
    */
   protected payload?: ContactPayload
 
-  public readonly id: string // Contact Id
-
   /**
    * @private
    */
   constructor (
-    id: string,
+    public readonly id: string,
   ) {
     super()
     log.silly('Contact', `constructor(${id})`)
 
-    this.id = id
-
     // tslint:disable-next-line:variable-name
     const MyClass = instanceToClass(this, Contact)
 
diff --git a/src/user/friendship.ts b/src/user/friendship.ts
index b54cafb4ae0d4fdf4ede62007f438fdc0b501e0e..ee8aef42dcfc1983fe86f7c368d6559b2c63c321 100644
--- a/src/user/friendship.ts
+++ b/src/user/friendship.ts
@@ -114,42 +114,6 @@ export class Friendship extends Accessory implements Acceptable {
     throw new Error('to be implemented')
   }
 
-  // public static createConfirm(
-  //   contactId: string,
-  // ): FriendRequestPayload {
-  //   log.verbose('Friendship', 'createConfirm(%s)',
-  //                                         contactId,
-  //               )
-
-  //   const payload: FriendRequestPayloadConfirm = {
-  //     type : FriendRequestType.Confirm,
-  //     contactId,
-  //   }
-
-  //   return payload
-  // }
-
-  // public static createReceive(
-  //   contactId : string,
-  //   hello     : string,
-  //   ticket    : string,
-  // ): FriendRequestPayload {
-  //   log.verbose('Friendship', 'createReceive(%s, %s, %s)',
-  //                                         contactId,
-  //                                         hello,
-  //                                         ticket,
-  //               )
-
-  //   const payload: FriendRequestPayloadReceive = {
-  //     type : FriendRequestType.Receive,
-  //     contactId,
-  //     hello,
-  //     ticket,
-  //   }
-
-  //   return payload
-  // }
-
   /**
    *
    * Instance Properties
@@ -162,7 +126,7 @@ export class Friendship extends Accessory implements Acceptable {
   protected payload?: FriendshipPayload
 
   constructor (
-    public id: string,
+    public readonly id: string,
   ) {
     super()
     log.verbose('Friendship', 'constructor(id=%s)', id)
diff --git a/src/user/room-invitation.ts b/src/user/room-invitation.ts
index fbd4ba9598ac4420c736ffd5aab9fa6b9c87f37a..5f9ae15e1bbf7b5e33318474432e299b74fb4f85 100644
--- a/src/user/room-invitation.ts
+++ b/src/user/room-invitation.ts
@@ -55,7 +55,7 @@ export class RoomInvitation extends Accessory implements Acceptable {
    *
    */
   constructor (
-    public id: string,
+    public readonly id: string,
   ) {
     super()
     log.verbose('RoomInvitation', 'constructor(id=%s)', id)
diff --git a/src/user/room.ts b/src/user/room.ts
index c6d059fc1789ce6f056117a74d837633926583ac..965757b619b08b73487d26444f7383cb7ace2a46 100644
--- a/src/user/room.ts
+++ b/src/user/room.ts
@@ -269,19 +269,15 @@ export class Room extends Accessory implements Sayable {
    */
   protected payload?: RoomPayload
 
-  public readonly id: string  // Room Id
-
   /**
    * @private
    */
   constructor (
-    id: string,
+    public readonly id: string,
   ) {
     super()
     log.silly('Room', `constructor(${id})`)
 
-    this.id = id
-
     // tslint:disable-next-line:variable-name
     const MyClass = instanceToClass(this, Room)