diff --git a/lib/stripe.rb b/lib/stripe.rb
index a7a6894c..d3a9b6a2 100644
--- a/lib/stripe.rb
+++ b/lib/stripe.rb
@@ -41,6 +41,7 @@ require 'stripe/card'
 require 'stripe/subscription'
 require 'stripe/application_fee'
 require 'stripe/refund'
+require 'stripe/reversal'
 require 'stripe/application_fee_refund'
 require 'stripe/bitcoin_receiver'
 require 'stripe/bitcoin_transaction'
diff --git a/lib/stripe/account.rb b/lib/stripe/account.rb
index 163e7ca9..7f539b8e 100644
--- a/lib/stripe/account.rb
+++ b/lib/stripe/account.rb
@@ -14,7 +14,15 @@ module Stripe
 
     # @override To make id optional
     def self.retrieve(id=nil, opts={})
-      super
+      # Account used to be a singleton, where this method's signature was `(opts={})`.
+      # For the sake of not breaking folks who pass in an OAuth key in opts, let's lurkily
+      # string match for it.
+      if opts == {} && id.is_a?(String) && id.start_with?('sk_')
+        # `super` properly assumes a String opts is the apiKey and normalizes as expected.
+        opts = id
+        id = nil
+      end
+      super(id, opts)
     end
 
     def deauthorize(client_id, opts={})
diff --git a/lib/stripe/reversal.rb b/lib/stripe/reversal.rb
new file mode 100644
index 00000000..fdb1e050
--- /dev/null
+++ b/lib/stripe/reversal.rb
@@ -0,0 +1,14 @@
+module Stripe
+  class Reversal < APIResource
+    include Stripe::APIOperations::Update
+    include Stripe::APIOperations::List
+
+    def url
+      "#{Transfer.url}/#{CGI.escape(transfer)}/reversals/#{CGI.escape(id)}"
+    end
+
+    def self.retrieve(id, opts={})
+      raise NotImplementedError.new("Reversals cannot be retrieved without a transfer ID. Retrieve a reversal using transfer.reversals.retrieve('reversal_id')")
+    end
+  end
+end
diff --git a/lib/stripe/util.rb b/lib/stripe/util.rb
index b8f37277..2aa618a2 100644
--- a/lib/stripe/util.rb
+++ b/lib/stripe/util.rb
@@ -39,6 +39,7 @@ module Stripe
         'subscription' => Subscription,
         'file_upload' => FileUpload,
         'transfer' => Transfer,
+        'transfer_reversal' => Reversal,
         'bitcoin_receiver' => BitcoinReceiver,
         'bitcoin_transaction' => BitcoinTransaction
       }
diff --git a/test/stripe/reversal_test.rb b/test/stripe/reversal_test.rb
new file mode 100644
index 00000000..58707e8b
--- /dev/null
+++ b/test/stripe/reversal_test.rb
@@ -0,0 +1,47 @@
+require File.expand_path('../../test_helper', __FILE__)
+
+module Stripe
+  class ReversalTest < Test::Unit::TestCase
+    should "reversals should be listable" do
+      @mock.expects(:get).once.returns(test_response(test_transfer))
+
+      transfer = Stripe::Transfer.retrieve('test_transfer')
+
+      assert transfer.reversals.first.kind_of?(Stripe::Reversal)
+    end
+
+    should "reversals should be refreshable" do
+      @mock.expects(:get).twice.returns(test_response(test_transfer), test_response(test_reversal(:id => 'refreshed_reversal')))
+
+      transfer = Stripe::Transfer.retrieve('test_transfer')
+      reversal = transfer.reversals.first
+      reversal.refresh
+
+      assert_equal 'refreshed_reversal', reversal.id
+    end
+
+    should "reversals should be updateable" do
+      @mock.expects(:get).once.returns(test_response(test_transfer))
+      @mock.expects(:post).once.returns(test_response(test_reversal(:metadata => {'key' => 'value'})))
+
+      transfer = Stripe::Transfer.retrieve('test_transfer')
+      reversal = transfer.reversals.first
+
+      assert_equal nil, reversal.metadata['key']
+
+      reversal.metadata['key'] = 'value'
+      reversal.save
+
+      assert_equal 'value', reversal.metadata['key']
+    end
+
+    should "create should return a new reversal" do
+      @mock.expects(:get).once.returns(test_response(test_transfer))
+      @mock.expects(:post).once.returns(test_response(test_reversal(:id => 'test_new_reversal')))
+
+      transfer = Stripe::Transfer.retrieve('test_transfer')
+      reversals = transfer.reversals.create(:amount => 20)
+      assert_equal 'test_new_reversal', reversals.id
+    end
+  end
+end
diff --git a/test/test_data.rb b/test/test_data.rb
index 75a570bb..a7a4233d 100644
--- a/test/test_data.rb
+++ b/test/test_data.rb
@@ -254,6 +254,13 @@ module Stripe
       }
     end
 
+    def test_reversal_array(transfer_id)
+      {
+        :data => [test_reversal, test_reversal, test_reversal],
+        :object => 'list',
+        :url => '/v1/transfers/' + transfer_id + '/reversals'
+      }
+    end
 
     def test_invoice
       {
@@ -359,6 +366,7 @@ module Stripe
         :fee => 0,
         :fee_details => [],
         :id => "tr_test_transfer",
+        :reversals => test_reversal_array('tr_test_transfer'),
         :livemode => false,
         :currency => "usd",
         :object => "transfer",
@@ -381,6 +389,18 @@ module Stripe
       })
     end
 
+    def test_reversal(params={})
+      {
+        :object => 'transfer_reversal',
+        :amount => 30,
+        :currency => "usd",
+        :created => 1308595038,
+        :id => "ref_test_reversal",
+        :transfer => "tr_test_transfer",
+        :metadata => {}
+      }.merge(params)
+    end
+
     def test_bitcoin_receiver(params={})
       {
         :id => 'btcrcv_test_receiver',