diff --git a/Octokit.Reactive/Clients/IObservableAuthorizationsClient.cs b/Octokit.Reactive/Clients/IObservableAuthorizationsClient.cs
index 5109bc2c..48847f87 100644
--- a/Octokit.Reactive/Clients/IObservableAuthorizationsClient.cs
+++ b/Octokit.Reactive/Clients/IObservableAuthorizationsClient.cs
@@ -133,10 +133,34 @@ namespace Octokit.Reactive
         IObservable<Authorization> Update(int id, AuthorizationUpdate authorizationUpdate);
 
         /// <summary>
-        /// Deletes an <see cref="Authorization"/>.
+        /// Deletes the specified <see cref="Authorization"/>.
         /// </summary>
-        /// <param name="id">The systemwide id of the authorization</param>
-        /// <returns></returns>
+        /// <remarks>
+        /// This method requires authentication.
+        /// See the <a href="http://developer.github.com/v3/oauth/#delete-an-authorization">API 
+        /// documentation</a> for more details.
+        /// </remarks>
+        /// <param name="id">The system-wide ID of the authorization to delete</param>
+        /// <exception cref="AuthorizationException">
+        /// Thrown when the current user does not have permission to make the request.
+        /// </exception>
+        /// <exception cref="ApiException">Thrown when a general API error occurs.</exception>
         IObservable<Unit> Delete(int id);
+
+        /// <summary>
+        /// Deletes the specified <see cref="Authorization"/>.
+        /// </summary>
+        /// <remarks>
+        /// This method requires authentication.
+        /// See the <a href="http://developer.github.com/v3/oauth/#delete-an-authorization">API 
+        /// documentation</a> for more details.
+        /// </remarks>
+        /// <param name="id">The system-wide ID of the authorization to delete</param>
+        /// <param name="twoFactorAuthenticationCode">Two factor authorization code</param>
+        /// <exception cref="AuthorizationException">
+        /// Thrown when the current user does not have permission to make the request.
+        /// </exception>
+        /// <exception cref="ApiException">Thrown when a general API error occurs.</exception>
+        IObservable<Unit> Delete(int id, string twoFactorAuthenticationCode);
     }
 }
diff --git a/Octokit.Reactive/Clients/ObservableAuthorizationsClient.cs b/Octokit.Reactive/Clients/ObservableAuthorizationsClient.cs
index 82453680..6b0bd124 100644
--- a/Octokit.Reactive/Clients/ObservableAuthorizationsClient.cs
+++ b/Octokit.Reactive/Clients/ObservableAuthorizationsClient.cs
@@ -201,13 +201,40 @@ namespace Octokit.Reactive
         }
 
         /// <summary>
-        /// Deletes an <see cref="Authorization"/>.
+        /// Deletes the specified <see cref="Authorization"/>.
         /// </summary>
-        /// <param name="id">The systemwide id of the authorization</param>
-        /// <returns></returns>
+        /// <remarks>
+        /// This method requires authentication.
+        /// See the <a href="http://developer.github.com/v3/oauth/#delete-an-authorization">API 
+        /// documentation</a> for more details.
+        /// </remarks>
+        /// <param name="id">The system-wide ID of the authorization to delete</param>
+        /// <exception cref="AuthorizationException">
+        /// Thrown when the current user does not have permission to make the request.
+        /// </exception>
+        /// <exception cref="ApiException">Thrown when a general API error occurs.</exception>
         public IObservable<Unit> Delete(int id)
         {
             return _client.Delete(id).ToObservable();
         }
+
+        /// <summary>
+        /// Deletes the specified <see cref="Authorization"/>.
+        /// </summary>
+        /// <remarks>
+        /// This method requires authentication.
+        /// See the <a href="http://developer.github.com/v3/oauth/#delete-an-authorization">API 
+        /// documentation</a> for more details.
+        /// </remarks>
+        /// <param name="id">The system-wide ID of the authorization to delete</param>
+        /// <param name="twoFactorAuthenticationCode">Two factor authorization code</param>
+        /// <exception cref="AuthorizationException">
+        /// Thrown when the current user does not have permission to make the request.
+        /// </exception>
+        /// <exception cref="ApiException">Thrown when a general API error occurs.</exception>
+        public IObservable<Unit> Delete(int id, string twoFactorAuthenticationCode)
+        {
+            return _client.Delete(id, twoFactorAuthenticationCode).ToObservable();
+        }
     }
 }
diff --git a/Octokit/Clients/IAuthorizationsClient.cs b/Octokit/Clients/IAuthorizationsClient.cs
index 583bcd89..9d050d54 100644
--- a/Octokit/Clients/IAuthorizationsClient.cs
+++ b/Octokit/Clients/IAuthorizationsClient.cs
@@ -178,5 +178,22 @@ namespace Octokit
         /// <exception cref="ApiException">Thrown when a general API error occurs.</exception>
         /// <returns>A <see cref="Task"/> for the request's execution.</returns>
         Task Delete(int id);
+
+        /// <summary>
+        /// Deletes the specified <see cref="Authorization"/>.
+        /// </summary>
+        /// <remarks>
+        /// This method requires authentication.
+        /// See the <a href="http://developer.github.com/v3/oauth/#delete-an-authorization">API 
+        /// documentation</a> for more details.
+        /// </remarks>
+        /// <param name="id">The system-wide ID of the authorization to delete</param>
+        /// <param name="twoFactorAuthenticationCode">Two factor authorization code</param>
+        /// <exception cref="AuthorizationException">
+        /// Thrown when the current user does not have permission to make the request.
+        /// </exception>
+        /// <exception cref="ApiException">Thrown when a general API error occurs.</exception>
+        /// <returns>A <see cref="Task"/> for the request's execution.</returns>
+        Task Delete(int id, string twoFactorAuthenticationCode);
     }
 }
diff --git a/Octokit/Http/ApiConnection.cs b/Octokit/Http/ApiConnection.cs
index dc6881dc..51113271 100644
--- a/Octokit/Http/ApiConnection.cs
+++ b/Octokit/Http/ApiConnection.cs
@@ -332,6 +332,19 @@ namespace Octokit
             return Connection.Delete(uri);
         }
 
+        /// <summary>
+        /// Deletes the API object at the specified URI.
+        /// </summary>
+        /// <param name="uri">URI of the API resource to delete</param>
+        /// <param name="twoFactorAuthenticationCode">Two Factor Code</param>
+        /// <returns>A <see cref="Task"/> for the request's execution.</returns>
+        public Task Delete(Uri uri, string twoFactorAuthenticationCode)
+        {
+            Ensure.ArgumentNotNull(uri, "uri");
+
+            return Connection.Delete(uri, twoFactorAuthenticationCode);
+        }
+
         /// <summary>
         /// Deletes the API object at the specified URI.
         /// </summary>
diff --git a/Octokit/Http/Connection.cs b/Octokit/Http/Connection.cs
index 29dc6f1b..a4c88909 100644
--- a/Octokit/Http/Connection.cs
+++ b/Octokit/Http/Connection.cs
@@ -361,6 +361,26 @@ namespace Octokit
             return response.HttpResponse.StatusCode;
         }
 
+        /// <summary>
+        /// Performs an asynchronous HTTP DELETE request that expects an empty response.
+        /// </summary>
+        /// <param name="uri">URI endpoint to send request to</param>
+        /// <param name="twoFactorAuthenticationCode">Two Factor Code</param>
+        /// <returns>The returned <seealso cref="HttpStatusCode"/></returns>
+        public async Task<HttpStatusCode> Delete(Uri uri, string twoFactorAuthenticationCode)
+        {
+            Ensure.ArgumentNotNull(uri, "uri");
+
+            var response = await SendData<object>(
+                uri,
+                HttpMethod.Delete,
+                null,
+                null,
+                CancellationToken.None,
+                twoFactorAuthenticationCode);
+            return response.HttpResponse.StatusCode;
+        }
+
         /// <summary>
         /// Performs an asynchronous HTTP DELETE request that expects an empty response.
         /// </summary>
diff --git a/Octokit/Http/IApiConnection.cs b/Octokit/Http/IApiConnection.cs
index 18416063..5bf11f8b 100644
--- a/Octokit/Http/IApiConnection.cs
+++ b/Octokit/Http/IApiConnection.cs
@@ -203,6 +203,14 @@ namespace Octokit
         /// <returns>A <see cref="Task"/> for the request's execution.</returns>
         Task Delete(Uri uri);
 
+        /// <summary>
+        /// Deletes the API object at the specified URI.
+        /// </summary>
+        /// <param name="uri">URI of the API resource to delete</param>
+        /// <param name="twoFactorAuthenticationCode">Two Factor Code</param>
+        /// <returns>A <see cref="Task"/> for the request's execution.</returns>
+        Task Delete(Uri uri, string twoFactorAuthenticationCode);
+
         /// <summary>
         /// Deletes the API object at the specified URI.
         /// </summary>
diff --git a/Octokit/Http/IConnection.cs b/Octokit/Http/IConnection.cs
index 41b77e86..37a6c004 100644
--- a/Octokit/Http/IConnection.cs
+++ b/Octokit/Http/IConnection.cs
@@ -164,6 +164,14 @@ namespace Octokit
         /// <returns>The returned <seealso cref="HttpStatusCode"/></returns>
         Task<HttpStatusCode> Delete(Uri uri);
 
+        /// <summary>
+        /// Performs an asynchronous HTTP DELETE request that expects an empty response.
+        /// </summary>
+        /// <param name="uri">URI endpoint to send request to</param>
+        /// <param name="twoFactorAuthenticationCode">Two Factor Code</param>
+        /// <returns>The returned <seealso cref="HttpStatusCode"/></returns>
+        Task<HttpStatusCode> Delete(Uri uri, string twoFactorAuthenticationCode);
+
         /// <summary>
         /// Performs an asynchronous HTTP DELETE request that expects an empty response.
         /// </summary>