diff --git a/src/client/NP/NPClient.cs b/src/client/NP/NPClient.cs
index e507850..78cc750 100644
--- a/src/client/NP/NPClient.cs
+++ b/src/client/NP/NPClient.cs
@@ -6,6 +6,7 @@ using System.Threading.Tasks;
 using log4net;
 using NPSharp.RPC;
 using NPSharp.RPC.Messages.Client;
+using NPSharp.RPC.Messages.Data;
 using NPSharp.RPC.Messages.Server;
 
 namespace NPSharp.NP
@@ -38,7 +39,7 @@ namespace NPSharp.NP
         /// <summary>
         ///     The internal RPC client.
         /// </summary>
-        public RPCClientStream RPCClient { get { return _rpc; } }
+        public RPCClientStream RPCClient { get; private set; }
 
         /// <summary>
         ///     The assigned NP user ID. Will be set on successful authentication.
@@ -155,7 +156,7 @@ namespace NPSharp.NP
         {
             var tcs = new TaskCompletionSource<bool>();
 
-            _rpc.AttachHandlerForNextMessage(packet =>
+            RPC.AttachHandlerForNextMessage(packet =>
             {
                 var result = packet as AuthenticateResultMessage;
                 if (result == null)
@@ -172,31 +173,34 @@ namespace NPSharp.NP
                 SessionToken = result.SessionToken;
                 tcs.SetResult(true);
             });
-            _rpc.Send(new AuthenticateWithKeyMessage { LicenseKey = key });
+            RPC.Send(new AuthenticateWithKeyMessage { LicenseKey = key });
 
             return await tcs.Task;
         }
 
-        public async Task<bool> ValidateTicket(uint clientIP, ulong npID, byte[] ticket)
+        /// <summary>
+        ///     Authenticates a server ticket.
+        /// </summary>
+        /// <returns>True if the ticket validation succeeded, otherwise false.</returns>
+        public async Task<bool> ValidateTicket(IPAddress clientIP, Ticket ticket)
         {
             var tcs = new TaskCompletionSource<bool>();
 
-            _rpc.AttachHandlerForNextMessage(packet =>
+            RPC.AttachHandlerForNextMessage(packet =>
             {
                 var result = packet as AuthenticateValidateTicketResultMessage;
                 if (result == null)
                     return;
 
-                if (result.Result != 0)
-                {
-                    tcs.SetResult(false);
-                }
-                else
-                {
-                    tcs.SetResult(true);
-                }
+                tcs.SetResult(result.Result == 0);
+            });
+
+            RPC.Send(new AuthenticateValidateTicketMessage
+            {
+                ClientIP = (uint)IPAddress.HostToNetworkOrder((int)BitConverter.ToUInt32(clientIP.GetAddressBytes(), 0)),
+                Ticket = ticket.Serialize(),
+                NPID = ticket.ClientID
             });
-            _rpc.Send(new AuthenticateValidateTicketMessage { ClientIP = clientIP, Ticket = ticket, NPID = npID });
 
             return await tcs.Task;
         }
diff --git a/src/client/RPC/Messages/Data/Ticket.cs b/src/client/RPC/Messages/Data/Ticket.cs
index 0f79f3a..886a96b 100644
--- a/src/client/RPC/Messages/Data/Ticket.cs
+++ b/src/client/RPC/Messages/Data/Ticket.cs
@@ -3,8 +3,15 @@ using System.IO;
 
 namespace NPSharp.RPC.Messages.Data
 {
-    internal class Ticket
+    /// <summary>
+    /// Represents a ticket which is used to validate client-to-gameserver connections.
+    /// </summary>
+    public class Ticket
     {
+        /// <summary>
+        /// Reconstructs the ticket from raw byte data.
+        /// </summary>
+        /// <param name="data">The ticket's raw data</param>
         public Ticket(byte[] data)
         {
             if (data.Length < sizeof (uint) + (sizeof (ulong)*2) + sizeof (uint))
@@ -22,27 +29,45 @@ namespace NPSharp.RPC.Messages.Data
             }
         }
 
-        // TODO: Maybe leave out arguments which are supposed to be autofilled
-        public Ticket(uint version, ulong clientID, ulong serverID, uint? time = null)
+        /// <summary>
+        /// Constructs a ticket from given parameters.
+        /// </summary>
+        /// <param name="clientID">The client NPID</param>
+        /// <param name="serverID">The server NPID</param>
+        /// <param name="version">The ticket's structure version</param>
+        /// <param name="time">The ticket time</param>
+        public Ticket(ulong clientID, ulong serverID, uint version = 1, uint? time = null)
         {
-            Version = version;
             ClientID = clientID;
             ServerID = serverID;
+            Version = version;
             if (time.HasValue)
                 Time = time.Value;
             else
                 Time = (uint) DateTime.Now.ToUniversalTime().ToBinary();
         }
 
+        /// <summary>
+        /// Ticket structure version.
+        /// </summary>
         public uint Version { get; private set; }
 
+        /// <summary>
+        /// The client's ID on the NP server.
+        /// </summary>
         public ulong ClientID { get; private set; }
 
+        /// <summary>
+        /// The gameserver's ID on the NP server.
+        /// </summary>
         public ulong ServerID { get; private set; }
 
+        /// <summary>
+        /// The creation time of the ticket.
+        /// </summary>
         public uint Time { get; private set; }
 
-        public byte[] Serialize()
+        internal byte[] Serialize()
         {
             using (var ms = new MemoryStream(sizeof (uint) + (sizeof (ulong)*2) + sizeof (uint)))
             {