diff --git a/CHANGELOG.md b/CHANGELOG.md
index 66fe368..5984231 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,6 @@
 ### Unreleased
 
+- [ENHANCEMENT]  Adds C2S order tyoe
 - [HOUSEKEEPING] updates nokogiri dependency
 - [HOUSEKEEPING] updates rexml dependency
 - [HOUSEKEEPING] adds Ruby 3.3 to CI
diff --git a/lib/epics.rb b/lib/epics.rb
index 39919b8..a27a13c 100644
--- a/lib/epics.rb
+++ b/lib/epics.rb
@@ -37,6 +37,7 @@
 require "epics/b2b"
 require "epics/xds"
 require "epics/cds"
+require "epics/c2s"
 require "epics/cdz"
 require "epics/crz"
 require "epics/xct"
diff --git a/lib/epics/c2s.rb b/lib/epics/c2s.rb
new file mode 100644
index 0000000..88a38d6
--- /dev/null
+++ b/lib/epics/c2s.rb
@@ -0,0 +1,9 @@
+class Epics::C2S < Epics::CDB
+  def order_attribute
+    "DZHNN"
+  end
+
+  def order_type
+    'C2S'
+  end
+end
diff --git a/lib/epics/cdb.rb b/lib/epics/cdb.rb
index 45f2552..c004f24 100644
--- a/lib/epics/cdb.rb
+++ b/lib/epics/cdb.rb
@@ -1,4 +1,12 @@
 class Epics::CDB < Epics::GenericUploadRequest
+  def order_attribute
+    'OZHNN'
+  end
+
+  def order_type
+    'CDB'
+  end
+
   def header
     Nokogiri::XML::Builder.new do |xml|
       xml.header(authenticate: true) {
@@ -10,8 +18,8 @@ def header
           xml.UserID user_id
           xml.Product("EPICS - a ruby ebics kernel", 'Language' => 'de')
           xml.OrderDetails {
-            xml.OrderType 'CDB'
-            xml.OrderAttribute 'OZHNN'
+            xml.OrderType order_type
+            xml.OrderAttribute order_attribute
             xml.StandardOrderParams
           }
           xml.BankPubKeyDigests {
diff --git a/lib/epics/client.rb b/lib/epics/client.rb
index 62104c6..9fa6f59 100644
--- a/lib/epics/client.rb
+++ b/lib/epics/client.rb
@@ -129,6 +129,10 @@ def CDB(document)
     upload(Epics::CDB, document)
   end
 
+  def C2S(document)
+    upload(Epics::C2S, document)
+  end
+
   def CDD(document)
     upload(Epics::CDD, document)
   end
diff --git a/spec/orders/c2s_spec.rb b/spec/orders/c2s_spec.rb
new file mode 100644
index 0000000..fba7b21
--- /dev/null
+++ b/spec/orders/c2s_spec.rb
@@ -0,0 +1,21 @@
+RSpec.describe Epics::C2S do
+
+  let(:client) { Epics::Client.new( File.open(File.join( File.dirname(__FILE__), '..', 'fixtures', 'SIZBN001.key')), 'secret' , 'https://194.180.18.30/ebicsweb/ebicsweb', 'SIZBN001', 'EBIX', 'EBICS') }
+  let(:document) { File.read( File.join( File.dirname(__FILE__), '..', 'fixtures', 'xml', 'cdb.xml') ) }
+  subject { described_class.new(client, document) }
+
+  describe 'order attributes' do
+    it { expect(subject.header.to_s).to include('<OrderAttribute>DZHNN</OrderAttribute>') }
+    it { expect(subject.header.to_s).to include('<OrderType>C2S</OrderType>') }
+  end
+
+  describe '#to_xml' do
+    specify { expect(subject.to_xml).to be_a_valid_ebics_doc }
+  end
+
+  describe '#to_transfer_xml' do
+    before { subject.transaction_id = SecureRandom.hex(16) }
+
+    specify { expect(subject.to_transfer_xml).to be_a_valid_ebics_doc }
+  end
+end