diff --git a/lib/mangopay/pay_in.rb b/lib/mangopay/pay_in.rb
index e1529c5..ee01983 100644
--- a/lib/mangopay/pay_in.rb
+++ b/lib/mangopay/pay_in.rb
@@ -58,6 +58,9 @@ def self.url(*)
         end
       end
 
+      class ExternalInstruction < Resource
+      end
+
     end
 
     module DirectDebit
diff --git a/spec/mangopay/payin_bankwire_external_instruction_spec.rb b/spec/mangopay/payin_bankwire_external_instruction_spec.rb
new file mode 100644
index 0000000..078c301
--- /dev/null
+++ b/spec/mangopay/payin_bankwire_external_instruction_spec.rb
@@ -0,0 +1,65 @@
+describe MangoPay::PayIn::BankWire::ExternalInstruction, type: :feature do
+  include_context 'wallets'
+  include_context 'payins'
+  
+  def check_type_and_status(payin)
+    expect(payin['Type']).to eq('PAYIN')
+    expect(payin['Nature']).to eq('REGULAR')
+    expect(payin['PaymentType']).to eq('BANK_WIRE')
+    expect(payin['ExecutionType']).to eq('EXTERNAL_INSTRUCTION')
+  end
+
+  describe 'FETCH' do
+    it 'fetches a payin' do
+      MangoPay.configure do |c|
+        c.preproduction = true
+        c.client_id = 'sdk-unit-tests'   
+        c.root_url = 'https://api-test.mangopay.com'
+        c.client_passphrase = '9RMGpwVUwFLK0SurxObJ2yaadDcO0zeKFKxWmthjB93SQjFzy0'
+        c.http_timeout = 10000
+      end
+
+      id = "2826947"
+      payIn = MangoPay::PayIn.fetch(id)
+      expect(payIn['Id']).to eq(id)
+      check_type_and_status(payIn)
+    end
+  end
+
+###############################################
+# refund not implemented for this type of payin
+###############################################
+#  describe 'REFUND' do
+#    it 'refunds a payin' do
+#      payin = new_payin_bankwire_direct
+#      refund = MangoPay::PayIn.refund(payin['Id'], {AuthorId: payin['AuthorId']})
+#      expect(refund['Id']).not_to be_nil
+#      expect(refund['Status']).to eq('SUCCEEDED')
+#      expect(refund['Type']).to eq('PAYOUT')
+#      expect(refund['Nature']).to eq('REFUND')
+#      expect(refund['InitialTransactionType']).to eq('PAYIN')
+#      expect(refund['InitialTransactionId']).to eq(payin['Id'])
+#      expect(refund['DebitedWalletId']).to eq(payin['CreditedWalletId'])
+#    end
+#  end
+#
+###############################################
+# status is CREATED instead of SUCCEEDED
+# so no cash flow yet
+###############################################
+#  describe 'CASH FLOW' do
+#    it 'changes balances correctly' do
+#      wlt = new_wallet
+#      wallets_check_amounts(wlt, 0)
+#
+#      # payin: feed wlt1 with money
+#      payin = create_new_payin_bankwire_direct(wlt, 1000)
+#      wallets_reload_and_check_amounts(wlt, 1000)
+#
+#      # refund the payin
+#      refund = MangoPay::PayIn.refund(payin['Id'], {AuthorId: payin['AuthorId']})
+#      wallets_reload_and_check_amounts(wlt, 0)
+#    end
+#  end
+
+end
diff --git a/spec/mangopay/shared_resources.rb b/spec/mangopay/shared_resources.rb
index 64871ae..87a62f6 100644
--- a/spec/mangopay/shared_resources.rb
+++ b/spec/mangopay/shared_resources.rb
@@ -394,4 +394,4 @@ def create_new_transfer(from_wallet, to_wallet, amnt = 500)
                                         Country: 'LU'
                                     }, new_wallet['Id'])
   }
-end
\ No newline at end of file
+end