diff --git a/contrib/zmq/zmq_sub.py b/contrib/zmq/zmq_sub.py
index decf29d42..2dbe2923b 100755
--- a/contrib/zmq/zmq_sub.py
+++ b/contrib/zmq/zmq_sub.py
@@ -10,8 +10,10 @@ zmqContext = zmq.Context()
 zmqSubSocket = zmqContext.socket(zmq.SUB)
 zmqSubSocket.setsockopt(zmq.SUBSCRIBE, "hashblock")
 zmqSubSocket.setsockopt(zmq.SUBSCRIBE, "hashtx")
+zmqSubSocket.setsockopt(zmq.SUBSCRIBE, "hashtxlock")
 zmqSubSocket.setsockopt(zmq.SUBSCRIBE, "rawblock")
 zmqSubSocket.setsockopt(zmq.SUBSCRIBE, "rawtx")
+zmqSubSocket.setsockopt(zmq.SUBSCRIBE, "rawtxlock")
 zmqSubSocket.connect("tcp://127.0.0.1:%i" % port)
 
 try:
@@ -26,12 +28,18 @@ try:
         elif topic == "hashtx":
             print '- HASH TX -'
             print binascii.hexlify(body)
+        elif topic == "hashtxlock":
+            print '- HASH TX LOCK -'
+            print binascii.hexlify(body)
         elif topic == "rawblock":
             print "- RAW BLOCK HEADER -"
             print binascii.hexlify(body[:80])
         elif topic == "rawtx":
             print '- RAW TX -'
             print binascii.hexlify(body)
+        elif topic == "rawtxlock":
+            print '- RAW TX LOCK -'
+            print binascii.hexlify(body)
 
 except KeyboardInterrupt:
     zmqContext.destroy()
diff --git a/doc/zmq.md b/doc/zmq.md
index 8d7ef37d7..f85c338b7 100644
--- a/doc/zmq.md
+++ b/doc/zmq.md
@@ -57,9 +57,11 @@ the commandline or in the configuration file.
 Currently, the following notifications are supported:
 
     -zmqpubhashtx=address
+    -zmqpubhashtxlock=address
     -zmqpubhashblock=address
     -zmqpubrawblock=address
     -zmqpubrawtx=address
+    -zmqpubrawtxlock=address
 
 The socket type is PUB and the address must be a valid ZeroMQ socket
 address. The same address can be used in more than one notification.
diff --git a/src/init.cpp b/src/init.cpp
index 06f9e0427..25f0cf443 100644
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -481,8 +481,10 @@ std::string HelpMessage(HelpMessageMode mode)
     strUsage += HelpMessageGroup(_("ZeroMQ notification options:"));
     strUsage += HelpMessageOpt("-zmqpubhashblock=<address>", _("Enable publish hash block in <address>"));
     strUsage += HelpMessageOpt("-zmqpubhashtx=<address>", _("Enable publish hash transaction in <address>"));
+    strUsage += HelpMessageOpt("-zmqpubhashtxlock=<address>", _("Enable publish hash transaction (locked via InstantSend) in <address>"));
     strUsage += HelpMessageOpt("-zmqpubrawblock=<address>", _("Enable publish raw block in <address>"));
     strUsage += HelpMessageOpt("-zmqpubrawtx=<address>", _("Enable publish raw transaction in <address>"));
+    strUsage += HelpMessageOpt("-zmqpubrawtxlock=<address>", _("Enable publish raw transaction (locked via InstantSend) in <address>"));
 #endif
 
     strUsage += HelpMessageGroup(_("Debugging/Testing options:"));
diff --git a/src/instantx.cpp b/src/instantx.cpp
index 4f58e42d0..e938d082d 100644
--- a/src/instantx.cpp
+++ b/src/instantx.cpp
@@ -386,11 +386,12 @@ void UpdateLockedTransaction(CTransaction& tx, bool fForceNotification) {
     // there must be a successfully verified lock request
     if (!mapTxLockReq.count(txHash)) return;
 
+    int nSignatures = GetTransactionLockSignatures(txHash);
+
 #ifdef ENABLE_WALLET
     if(pwalletMain && pwalletMain->UpdatedTransaction(txHash)){
         // bumping this to update UI
         nCompleteTXLocks++;
-        int nSignatures = GetTransactionLockSignatures(txHash);
         // a transaction lock must have enough signatures to trigger this notification
         if(nSignatures == INSTANTX_SIGNATURES_REQUIRED || (fForceNotification && nSignatures > INSTANTX_SIGNATURES_REQUIRED)) {
             // notify an external script once threshold is reached
@@ -403,6 +404,10 @@ void UpdateLockedTransaction(CTransaction& tx, bool fForceNotification) {
         }
     }
 #endif
+
+    if(nSignatures == INSTANTX_SIGNATURES_REQUIRED || (fForceNotification && nSignatures > INSTANTX_SIGNATURES_REQUIRED)) {
+        GetMainSignals().NotifyTransactionLock(tx);
+    }
 }
 
 void LockTransactionInputs(CTransaction& tx) {
diff --git a/src/validationinterface.cpp b/src/validationinterface.cpp
index 81f3b775f..b6c5752ce 100644
--- a/src/validationinterface.cpp
+++ b/src/validationinterface.cpp
@@ -15,6 +15,7 @@ CMainSignals& GetMainSignals()
 void RegisterValidationInterface(CValidationInterface* pwalletIn) {
     g_signals.UpdatedBlockTip.connect(boost::bind(&CValidationInterface::UpdatedBlockTip, pwalletIn, _1));
     g_signals.SyncTransaction.connect(boost::bind(&CValidationInterface::SyncTransaction, pwalletIn, _1, _2));
+    g_signals.NotifyTransactionLock.connect(boost::bind(&CValidationInterface::NotifyTransactionLock, pwalletIn, _1));
     g_signals.UpdatedTransaction.connect(boost::bind(&CValidationInterface::UpdatedTransaction, pwalletIn, _1));
     g_signals.SetBestChain.connect(boost::bind(&CValidationInterface::SetBestChain, pwalletIn, _1));
     g_signals.Inventory.connect(boost::bind(&CValidationInterface::Inventory, pwalletIn, _1));
@@ -32,6 +33,7 @@ void UnregisterValidationInterface(CValidationInterface* pwalletIn) {
     g_signals.Inventory.disconnect(boost::bind(&CValidationInterface::Inventory, pwalletIn, _1));
     g_signals.SetBestChain.disconnect(boost::bind(&CValidationInterface::SetBestChain, pwalletIn, _1));
     g_signals.UpdatedTransaction.disconnect(boost::bind(&CValidationInterface::UpdatedTransaction, pwalletIn, _1));
+    g_signals.NotifyTransactionLock.disconnect(boost::bind(&CValidationInterface::NotifyTransactionLock, pwalletIn, _1));
     g_signals.SyncTransaction.disconnect(boost::bind(&CValidationInterface::SyncTransaction, pwalletIn, _1, _2));
     g_signals.UpdatedBlockTip.disconnect(boost::bind(&CValidationInterface::UpdatedBlockTip, pwalletIn, _1));
 }
@@ -44,6 +46,7 @@ void UnregisterAllValidationInterfaces() {
     g_signals.Inventory.disconnect_all_slots();
     g_signals.SetBestChain.disconnect_all_slots();
     g_signals.UpdatedTransaction.disconnect_all_slots();
+    g_signals.NotifyTransactionLock.disconnect_all_slots();
     g_signals.SyncTransaction.disconnect_all_slots();
     g_signals.UpdatedBlockTip.disconnect_all_slots();
 }
diff --git a/src/validationinterface.h b/src/validationinterface.h
index d52a96264..d621fd709 100644
--- a/src/validationinterface.h
+++ b/src/validationinterface.h
@@ -33,6 +33,7 @@ class CValidationInterface {
 protected:
     virtual void UpdatedBlockTip(const CBlockIndex *pindex) {}
     virtual void SyncTransaction(const CTransaction &tx, const CBlock *pblock) {}
+    virtual void NotifyTransactionLock(const CTransaction &tx) {}
     virtual void SetBestChain(const CBlockLocator &locator) {}
     virtual bool UpdatedTransaction(const uint256 &hash) { return false;}
     virtual void Inventory(const uint256 &hash) {}
@@ -50,6 +51,8 @@ struct CMainSignals {
     boost::signals2::signal<void (const CBlockIndex *)> UpdatedBlockTip;
     /** Notifies listeners of updated transaction data (transaction, and optionally the block it is found in. */
     boost::signals2::signal<void (const CTransaction &, const CBlock *)> SyncTransaction;
+    /** Notifies listeners of an updated transaction lock without new data. */
+    boost::signals2::signal<void (const CTransaction &)> NotifyTransactionLock;
     /** Notifies listeners of an updated transaction without new data (for now: a coinbase potentially becoming visible). */
     boost::signals2::signal<bool (const uint256 &)> UpdatedTransaction;
     /** Notifies listeners of a new active block chain. */
diff --git a/src/zmq/zmqabstractnotifier.cpp b/src/zmq/zmqabstractnotifier.cpp
index 9f5cb3ba6..76543a4a7 100644
--- a/src/zmq/zmqabstractnotifier.cpp
+++ b/src/zmq/zmqabstractnotifier.cpp
@@ -20,3 +20,8 @@ bool CZMQAbstractNotifier::NotifyTransaction(const CTransaction &/*transaction*/
 {
     return true;
 }
+
+bool CZMQAbstractNotifier::NotifyTransactionLock(const CTransaction &/*transaction*/)
+{
+    return true;
+}
diff --git a/src/zmq/zmqabstractnotifier.h b/src/zmq/zmqabstractnotifier.h
index 77cf5141e..0d3f1fcd4 100644
--- a/src/zmq/zmqabstractnotifier.h
+++ b/src/zmq/zmqabstractnotifier.h
@@ -34,6 +34,7 @@ public:
 
     virtual bool NotifyBlock(const CBlockIndex *pindex);
     virtual bool NotifyTransaction(const CTransaction &transaction);
+    virtual bool NotifyTransactionLock(const CTransaction &transaction);
 
 protected:
     void *psocket;
diff --git a/src/zmq/zmqnotificationinterface.cpp b/src/zmq/zmqnotificationinterface.cpp
index be2aec7d1..a8d3b2b89 100644
--- a/src/zmq/zmqnotificationinterface.cpp
+++ b/src/zmq/zmqnotificationinterface.cpp
@@ -37,8 +37,10 @@ CZMQNotificationInterface* CZMQNotificationInterface::CreateWithArguments(const
 
     factories["pubhashblock"] = CZMQAbstractNotifier::Create<CZMQPublishHashBlockNotifier>;
     factories["pubhashtx"] = CZMQAbstractNotifier::Create<CZMQPublishHashTransactionNotifier>;
+    factories["pubhashtxlock"] = CZMQAbstractNotifier::Create<CZMQPublishHashTransactionLockNotifier>;
     factories["pubrawblock"] = CZMQAbstractNotifier::Create<CZMQPublishRawBlockNotifier>;
     factories["pubrawtx"] = CZMQAbstractNotifier::Create<CZMQPublishRawTransactionNotifier>;
+    factories["pubrawtxlock"] = CZMQAbstractNotifier::Create<CZMQPublishRawTransactionLockNotifier>;
 
     for (std::map<std::string, CZMQNotifierFactory>::const_iterator i=factories.begin(); i!=factories.end(); ++i)
     {
@@ -158,3 +160,20 @@ void CZMQNotificationInterface::SyncTransaction(const CTransaction &tx, const CB
         }
     }
 }
+
+void CZMQNotificationInterface::NotifyTransactionLock(const CTransaction &tx)
+{
+    for (std::list<CZMQAbstractNotifier*>::iterator i = notifiers.begin(); i!=notifiers.end(); )
+    {
+        CZMQAbstractNotifier *notifier = *i;
+        if (notifier->NotifyTransactionLock(tx))
+        {
+            i++;
+        }
+        else
+        {
+            notifier->Shutdown();
+            i = notifiers.erase(i);
+        }
+    }
+}
diff --git a/src/zmq/zmqnotificationinterface.h b/src/zmq/zmqnotificationinterface.h
index 3ccfaf341..11d4db83d 100644
--- a/src/zmq/zmqnotificationinterface.h
+++ b/src/zmq/zmqnotificationinterface.h
@@ -26,6 +26,7 @@ protected:
     // CValidationInterface
     void SyncTransaction(const CTransaction &tx, const CBlock *pblock);
     void UpdatedBlockTip(const CBlockIndex *pindex);
+    void NotifyTransactionLock(const CTransaction &tx);
 
 private:
     CZMQNotificationInterface();
diff --git a/src/zmq/zmqpublishnotifier.cpp b/src/zmq/zmqpublishnotifier.cpp
index ddc8fe93e..07f0167be 100644
--- a/src/zmq/zmqpublishnotifier.cpp
+++ b/src/zmq/zmqpublishnotifier.cpp
@@ -139,6 +139,17 @@ bool CZMQPublishHashTransactionNotifier::NotifyTransaction(const CTransaction &t
     return rc == 0;
 }
 
+bool CZMQPublishHashTransactionLockNotifier::NotifyTransactionLock(const CTransaction &transaction)
+{
+    uint256 hash = transaction.GetHash();
+    LogPrint("zmq", "zmq: Publish hashtxlock %s\n", hash.GetHex());
+    char data[32];
+    for (unsigned int i = 0; i < 32; i++)
+        data[31 - i] = hash.begin()[i];
+    int rc = zmq_send_multipart(psocket, "hashtxlock", 10, data, 32, 0);
+    return rc == 0;
+}
+
 bool CZMQPublishRawBlockNotifier::NotifyBlock(const CBlockIndex *pindex)
 {
     LogPrint("zmq", "zmq: Publish rawblock %s\n", pindex->GetBlockHash().GetHex());
@@ -170,3 +181,13 @@ bool CZMQPublishRawTransactionNotifier::NotifyTransaction(const CTransaction &tr
     int rc = zmq_send_multipart(psocket, "rawtx", 5, &(*ss.begin()), ss.size(), 0);
     return rc == 0;
 }
+
+bool CZMQPublishRawTransactionLockNotifier::NotifyTransactionLock(const CTransaction &transaction)
+{
+    uint256 hash = transaction.GetHash();
+    LogPrint("zmq", "zmq: Publish rawtxlock %s\n", hash.GetHex());
+    CDataStream ss(SER_NETWORK, PROTOCOL_VERSION);
+    ss << transaction;
+    int rc = zmq_send_multipart(psocket, "rawtxlock", 9, &(*ss.begin()), ss.size(), 0);
+    return rc == 0;
+}
diff --git a/src/zmq/zmqpublishnotifier.h b/src/zmq/zmqpublishnotifier.h
index 44d5cbea6..c92150472 100644
--- a/src/zmq/zmqpublishnotifier.h
+++ b/src/zmq/zmqpublishnotifier.h
@@ -28,6 +28,12 @@ public:
     bool NotifyTransaction(const CTransaction &transaction);
 };
 
+class CZMQPublishHashTransactionLockNotifier : public CZMQAbstractPublishNotifier
+{
+public:
+    bool NotifyTransactionLock(const CTransaction &transaction);
+};
+
 class CZMQPublishRawBlockNotifier : public CZMQAbstractPublishNotifier
 {
 public:
@@ -40,4 +46,10 @@ public:
     bool NotifyTransaction(const CTransaction &transaction);
 };
 
+class CZMQPublishRawTransactionLockNotifier : public CZMQAbstractPublishNotifier
+{
+public:
+    bool NotifyTransactionLock(const CTransaction &transaction);
+};
+
 #endif // BITCOIN_ZMQ_ZMQPUBLISHNOTIFIER_H