diff --git a/alethzero/Transact.cpp b/alethzero/Transact.cpp
index 6c0f1d2bf..d7a60469a 100644
--- a/alethzero/Transact.cpp
+++ b/alethzero/Transact.cpp
@@ -28,6 +28,7 @@
 #include <boost/algorithm/string.hpp>
 #include <QFileDialog>
 #include <QMessageBox>
+#include <QClipboard>
 #include <liblll/Compiler.h>
 #include <liblll/CodeFragment.h>
 #if ETH_SOLIDITY || !ETH_TRUE
@@ -118,6 +119,11 @@ u256 Transact::gasPrice() const
 	return ui->gasPrice->value() * units()[units().size() - 1 - ui->gasPriceUnits->currentIndex()].first;
 }
 
+Address Transact::to() const
+{
+	return m_context->fromString(ui->destination->currentText().toStdString()).first;
+}
+
 u256 Transact::total() const
 {
 	return value() + fee();
@@ -133,7 +139,7 @@ void Transact::updateDestination()
 			if (ui->destination->findText(s, Qt::MatchExactly | Qt::MatchCaseSensitive) == -1)
 				ui->destination->addItem(s);
 	for (int i = 0; i < ui->destination->count(); ++i)
-		if (ui->destination->itemText(i) != "(Create Contract)" && !m_context->fromString(ui->destination->itemText(i).toStdString()).first)
+		if (ui->destination->itemText(i) != "(Create Contract)" && !to())
 			ui->destination->removeItem(i--);
 }
 
@@ -181,7 +187,23 @@ void Transact::on_destination_currentTextChanged(QString)
 	else
 		ui->calculatedName->setText("Create Contract");
 	rejigData();
-//	updateFee();
+	//	updateFee();
+}
+
+void Transact::on_copyUnsigned_clicked()
+{
+	auto a = fromAccount();
+	u256 nonce = ui->autoNonce->isChecked() ? ethereum()->countAt(a, PendingBlock) : ui->nonce->value();
+
+	Transaction t;
+	if (isCreation())
+		// If execution is a contract creation, add Natspec to
+		// a local Natspec LEVELDB
+		t = Transaction(value(), gasPrice(), ui->gas->value(), m_data, nonce);
+	else
+		// TODO: cache like m_data.
+		t = Transaction(value(), gasPrice(), ui->gas->value(), to(), m_data, nonce);
+	qApp->clipboard()->setText(QString::fromStdString(toHex(t.rlp())));
 }
 
 static std::string toString(TransactionException _te)
diff --git a/alethzero/Transact.h b/alethzero/Transact.h
index e2c1a6662..a1ce544f9 100644
--- a/alethzero/Transact.h
+++ b/alethzero/Transact.h
@@ -54,6 +54,7 @@ private slots:
 	void on_gasPrice_valueChanged(int) { updateFee(); rejigData(); }
 	void on_data_textChanged() { rejigData(); }
 	void on_optimize_clicked() { rejigData(); }
+	void on_copyUnsigned_clicked();
 	void on_send_clicked();
 	void on_debug_clicked();
 	void on_cancel_clicked() { close(); }
@@ -71,6 +72,7 @@ private:
 	dev::u256 total() const;
 	dev::u256 value() const;
 	dev::u256 gasPrice() const;
+	dev::Address to() const;
 
 	std::string natspecNotice(dev::Address _to, dev::bytes const& _data);
 	dev::Secret findSecret(dev::u256 _totalReq) const;
diff --git a/alethzero/Transact.ui b/alethzero/Transact.ui
index fe1fc4c3e..bd19808fd 100644
--- a/alethzero/Transact.ui
+++ b/alethzero/Transact.ui
@@ -254,6 +254,13 @@
      </property>
     </widget>
    </item>
+   <item row="8" column="1">
+    <widget class="QPushButton" name="copyUnsigned">
+     <property name="text">
+      <string>Copy &amp;Unsigned</string>
+     </property>
+    </widget>
+   </item>
   </layout>
  </widget>
  <resources/>