diff --git a/LeftPanel.qml b/LeftPanel.qml
index e9fa7467..06881a9d 100644
--- a/LeftPanel.qml
+++ b/LeftPanel.qml
@@ -424,7 +424,7 @@ Rectangle {
                 id: txkeyButton
                 anchors.left: parent.left
                 anchors.right: parent.right
-                text: qsTr("Check payment") + translationManager.emptyString
+                text: qsTr("Prove/check") + translationManager.emptyString
                 symbol: qsTr("K") + translationManager.emptyString
                 dotColor: "#FFD781"
                 under: advancedButton
diff --git a/MiddlePanel.qml b/MiddlePanel.qml
index a008a62a..25fc3170 100644
--- a/MiddlePanel.qml
+++ b/MiddlePanel.qml
@@ -65,7 +65,8 @@ Rectangle {
     signal paymentClicked(string address, string paymentId, string amount, int mixinCount, int priority, string description)
     signal sweepUnmixableClicked()
     signal generatePaymentIdInvoked()
-    signal checkPaymentClicked(string address, string txid, string txkey);
+    signal getTxProofClicked(string txid, string address, string message);
+    signal checkTxProofClicked(string txid, string address, string message, string signature);
 
     color: "#F0EEEE"
 
diff --git a/main.qml b/main.qml
index ae94f86a..d9916036 100644
--- a/main.qml
+++ b/main.qml
@@ -243,7 +243,8 @@ ApplicationWindow {
             currentWallet.connectionStatusChanged.disconnect(onWalletConnectionStatusChanged)
             middlePanel.paymentClicked.disconnect(handlePayment);
             middlePanel.sweepUnmixableClicked.disconnect(handleSweepUnmixable);
-            middlePanel.checkPaymentClicked.disconnect(handleCheckPayment);
+            middlePanel.getTxProofClicked.disconnect(handleGetTxProof);
+            middlePanel.checkTxProofClicked.disconnect(handleCheckTxProof);
         }
 
         currentWallet = undefined;
@@ -275,7 +276,8 @@ ApplicationWindow {
         currentWallet.connectionStatusChanged.connect(onWalletConnectionStatusChanged)
         middlePanel.paymentClicked.connect(handlePayment);
         middlePanel.sweepUnmixableClicked.connect(handleSweepUnmixable);
-        middlePanel.checkPaymentClicked.connect(handleCheckPayment);
+        middlePanel.getTxProofClicked.connect(handleGetTxProof);
+        middlePanel.checkTxProofClicked.connect(handleCheckTxProof);
 
 
         console.log("Recovering from seed: ", persistentSettings.is_recovering)
@@ -755,38 +757,54 @@ ApplicationWindow {
         currentWallet.store();
     }
 
-    // called on "checkPayment"
-    function handleCheckPayment(address, txid, txkey) {
-        console.log("Checking payment: ")
-        console.log("\taddress: ", address,
-                    ", txid: ", txid,
-                    ", txkey: ", txkey);
+    // called on "getTxProof"
+    function handleGetTxProof(txid, address, message) {
+        console.log("Getting payment proof: ")
+        console.log("\ttxid: ", txid,
+                    ", address: ", address,
+                    ", message: ", message);
 
-        var result = walletManager.checkPayment(address, txid, txkey, currentDaemonAddress);
-        var results = result.split("|");
-        if (results.length < 4) {
-            informationPopup.title  = qsTr("Error") + translationManager.emptyString;
-            informationPopup.text = "internal error";
-            informationPopup.icon = StandardIcon.Critical
-            informationPopup.onCloseCallback = null
-            informationPopup.open()
-            return
+        var result = currentWallet.getTxProof(txid, address, message);
+        informationPopup.title  = qsTr("Payment proof") + translationManager.emptyString;
+        if (result.startsWith("error|")) {
+            var errorString = result.split("|")[1];
+            informationPopup.text = qsTr("Couldn't generate a proof because of the following reason: \n") + errorString + translationManager.emptyString;
+            informationPopup.icon = StandardIcon.Critical;
+        } else {
+            informationPopup.text  = result;
+            informationPopup.icon = StandardIcon.Critical;
         }
-        var success = results[0] == "true";
-        var received = results[1]
-        var height = results[2]
-        var error = results[3]
-        if (success) {
-            informationPopup.title  = qsTr("Payment check") + translationManager.emptyString;
+        informationPopup.onCloseCallback = null
+        informationPopup.open()
+    }
+
+    // called on "checkTxProof"
+    function handleCheckTxProof(txid, address, message, signature) {
+        console.log("Checking payment proof: ")
+        console.log("\ttxid: ", txid,
+                    ", address: ", address,
+                    ", message: ", message,
+                    ", signature: ", signature);
+
+        var result = currentWallet.checkTxProof(txid, address, message, signature);
+        var results = result.split("|");
+        if (results.length == 5 && results[0] == "true") {
+            var good = results[1] == "true";
+            var received = results[2];
+            var in_pool = results[3] == "true";
+            var confirmations = results[4];
+
+            informationPopup.title  = qsTr("Payment proof check") + translationManager.emptyString;
             informationPopup.icon = StandardIcon.Information
-            if (received > 0) {
+            if (!good) {
+                informationPopup.text = qsTr("Bad signature");
+                informationPopup.icon = StandardIcon.Critical;
+            } else if (received > 0) {
                 received = received / 1e12
-                if (height == 0) {
+                if (in_pool) {
                     informationPopup.text = qsTr("This address received %1 monero, but the transaction is not yet mined").arg(received);
                 }
                 else {
-                    var dCurrentBlock = currentWallet.daemonBlockChainHeight();
-                    var confirmations = dCurrentBlock - height
                     informationPopup.text = qsTr("This address received %1 monero, with %2 confirmation(s).").arg(received).arg(confirmations);
                 }
             }
@@ -796,9 +814,10 @@ ApplicationWindow {
         }
         else {
             informationPopup.title  = qsTr("Error") + translationManager.emptyString;
-            informationPopup.text = error;
+            informationPopup.text = currentWallet.errorString;
             informationPopup.icon = StandardIcon.Critical
         }
+        informationPopup.onCloseCallback = null
         informationPopup.open()
     }
 
diff --git a/pages/TxKey.qml b/pages/TxKey.qml
index b51feea5..5bfeaac1 100644
--- a/pages/TxKey.qml
+++ b/pages/TxKey.qml
@@ -37,9 +37,6 @@ import moneroComponents.Clipboard 1.0
 Rectangle {
 
     color: "#F0EEEE"
-    property alias addressText : addressLine.text
-    property alias txIdText : txIdLine.text
-    property alias txKeyText : txKeyLine.text
 
     Clipboard { id: clipboard }
 
@@ -47,10 +44,10 @@ Rectangle {
       return walletManager.addressValid(address, testnet)
     }
 
-    function check256(str) {
-        if (str.length != 64)
+    function check256(str, length) {
+        if (str.length != length)
             return false;
-        for (var i = 0; i < 64; ++i) {
+        for (var i = 0; i < length; ++i) {
             if (str[i] >= '0' && str[i] <= '9')
                 continue;
             if (str[i] >= 'a' && str[i] <= 'z')
@@ -63,11 +60,12 @@ Rectangle {
     }
 
     function checkTxID(txid) {
-        return check256(txid)
+        return check256(txid, 64)
     }
 
-    function checkTxKey(txid) {
-        return check256(txid)
+    function checkSignature(signature) {
+        return signature.startsWith("OutProofV") && check256(signature, 142) ||
+               signature.startsWith("InProofV")  && check256(signature, 141)
     }
 
     /* main layout */
@@ -83,93 +81,32 @@ Rectangle {
         property int editWidth: 400
         property int lineEditFontSize: 12
 
-        RowLayout {
-            ColumnLayout {
-
-                Text {
-                    text: qsTr("Verify that a third party made a payment by supplying:") + translationManager.emptyString
-                    wrapMode: Text.Wrap
-                    Layout.fillWidth: true;
-                }
-                Text {
-                    text: qsTr(" - the recipient address") + translationManager.emptyString
-                    wrapMode: Text.Wrap
-                    Layout.fillWidth: true;
-                }
-                Text {
-                    text: qsTr(" - the transaction ID") + translationManager.emptyString
-                    wrapMode: Text.Wrap
-                    Layout.fillWidth: true;
-                }
-                Text {
-                    text: qsTr(" - the secret transaction key supplied by the sender") + translationManager.emptyString
-                    wrapMode: Text.Wrap
-                    Layout.fillWidth: true;
-                }
-                Text {
-                    text: qsTr("If a payment had several transactions then each must be checked and the results combined.") + translationManager.emptyString
-                    wrapMode: Text.Wrap
-                    Layout.fillWidth: true;
-                }
-            }
+        Text {
+            text: qsTr("Generate a proof of your incoming/outgoing payment by supplying the transaction ID, the recipient address and an optional message:") + translationManager.emptyString
+            wrapMode: Text.Wrap
+            Layout.fillWidth: true;
         }
 
         RowLayout {
-            id: addressRow
-
             Label {
-                id: addressLabel
-                fontSize: 14
-                text: qsTr("Address") + translationManager.emptyString
-                width: mainLayout.labelWidth
-            }
-
-            LineEdit {
-                id: addressLine
-                fontSize: mainLayout.lineEditFontSize
-                placeholderText: qsTr("Recipient's wallet address") + translationManager.emptyString;
-                readOnly: false
-                width: mainLayout.editWidth
-                Layout.fillWidth: true
-                onTextChanged: cursorPosition = 0
-
-                IconButton {
-                    imageSource: "../images/copyToClipboard.png"
-                    onClicked: {
-                        if (addressLine.text.length > 0) {
-                            clipboard.setText(addressLine.text)
-                        }
-                    }
-                }
-            }
-        }
-
-        RowLayout {
-            id: txIdRow
-            Label {
-                id: txIdLabel
                 fontSize: 14
                 text: qsTr("Transaction ID") + translationManager.emptyString
                 width: mainLayout.labelWidth
             }
 
-
             LineEdit {
-
-                id: txIdLine
+                id: getProofTxIdLine
                 fontSize: mainLayout.lineEditFontSize
                 placeholderText: qsTr("Paste tx ID") + translationManager.emptyString
                 readOnly: false
                 width: mainLayout.editWidth
                 Layout.fillWidth: true
 
-                onTextChanged: cursorPosition = 0
-
                 IconButton {
                     imageSource: "../images/copyToClipboard.png"
                     onClicked: {
-                        if (txIdLine.text.length > 0) {
-                            clipboard.setText(txIdLine.text)
+                        if (getProofTxIdLine.text.length > 0) {
+                            clipboard.setText(getProofTxIdLine.text)
                         }
                     }
                 }
@@ -178,29 +115,190 @@ Rectangle {
         }
 
         RowLayout {
-            id: txKeyRow
             Label {
-                id: paymentIdLabel
                 fontSize: 14
-                text: qsTr("Transaction key") + translationManager.emptyString
+                text: qsTr("Address") + translationManager.emptyString
                 width: mainLayout.labelWidth
             }
 
-
             LineEdit {
-                id: txKeyLine
+                id: getProofAddressLine
                 fontSize: mainLayout.lineEditFontSize
-                placeholderText: qsTr("Paste tx key") + translationManager.emptyString;
+                placeholderText: qsTr("Recipient's wallet address") + translationManager.emptyString;
                 readOnly: false
-
                 width: mainLayout.editWidth
                 Layout.fillWidth: true
 
                 IconButton {
                     imageSource: "../images/copyToClipboard.png"
                     onClicked: {
-                        if (TxKeyLine.text.length > 0) {
-                            clipboard.setText(TxKeyLine.text)
+                        if (getProofAddressLine.text.length > 0) {
+                            clipboard.setText(getProofAddressLine.text)
+                        }
+                    }
+                }
+            }
+        }
+
+        RowLayout {
+            Label {
+                fontSize: 14
+                text: qsTr("Message") + translationManager.emptyString
+                width: mainLayout.labelWidth
+            }
+
+            LineEdit {
+                id: getProofMessageLine
+                fontSize: mainLayout.lineEditFontSize
+                placeholderText: qsTr("Optional message against which the signature is signed") + translationManager.emptyString;
+                readOnly: false
+                width: mainLayout.editWidth
+                Layout.fillWidth: true
+
+                IconButton {
+                    imageSource: "../images/copyToClipboard.png"
+                    onClicked: {
+                        if (getProofMessageLine.text.length > 0) {
+                            clipboard.setText(getProofMessageLine.text)
+                        }
+                    }
+                }
+            }
+        }
+
+        StandardButton {
+            anchors.left: parent.left
+            anchors.topMargin: 17
+            width: 60
+            text: qsTr("Generate") + translationManager.emptyString
+            shadowReleasedColor: "#FF4304"
+            shadowPressedColor: "#B32D00"
+            releasedColor: "#FF6C3C"
+            pressedColor: "#FF4304"
+            enabled: checkTxID(getProofTxIdLine.text) && checkAddress(getProofAddressLine.text, appWindow.persistentSettings.testnet)
+            onClicked: {
+                console.log("getProof: Generate clicked: txid " + getProofTxIdLine.text + ", address " + getProofAddressLine.text + ", message: " + getProofMessageLine.text);
+                root.getProofClicked(getProofTxIdLine.text, getProofAddressLine.text, getProofMessageLine.text)
+            }
+        }
+
+        // underline
+        Rectangle {
+            height: 1
+            color: "#DBDBDB"
+            Layout.fillWidth: true
+            Layout.alignment: Qt.AlignHCenter
+            anchors.bottomMargin: 3
+
+        }
+
+        Text {
+            text: qsTr("Verify that funds were paid to an address by supplying the transaction ID, the recipient address, the message used for signing and the signature:") + translationManager.emptyString
+            wrapMode: Text.Wrap
+            Layout.fillWidth: true;
+        }
+
+        RowLayout {
+            Label {
+                fontSize: 14
+                text: qsTr("Transaction ID") + translationManager.emptyString
+                width: mainLayout.labelWidth
+            }
+
+            LineEdit {
+                id: checkProofTxIdLine
+                fontSize: mainLayout.lineEditFontSize
+                placeholderText: qsTr("Paste tx ID") + translationManager.emptyString
+                readOnly: false
+                width: mainLayout.editWidth
+                Layout.fillWidth: true
+
+                IconButton {
+                    imageSource: "../images/copyToClipboard.png"
+                    onClicked: {
+                        if (checkProofTxIdLine.text.length > 0) {
+                            clipboard.setText(checkProofTxIdLine.text)
+                        }
+                    }
+                }
+
+            }
+        }
+
+        RowLayout {
+            Label {
+                fontSize: 14
+                text: qsTr("Address") + translationManager.emptyString
+                width: mainLayout.labelWidth
+            }
+
+            LineEdit {
+                id: checkProofAddressLine
+                fontSize: mainLayout.lineEditFontSize
+                placeholderText: qsTr("Recipient's wallet address") + translationManager.emptyString;
+                readOnly: false
+                width: mainLayout.editWidth
+                Layout.fillWidth: true
+
+                IconButton {
+                    imageSource: "../images/copyToClipboard.png"
+                    onClicked: {
+                        if (checkProofAddressLine.text.length > 0) {
+                            clipboard.setText(checkProofAddressLine.text)
+                        }
+                    }
+                }
+            }
+        }
+
+        RowLayout {
+            Label {
+                fontSize: 14
+                text: qsTr("Message") + translationManager.emptyString
+                width: mainLayout.labelWidth
+            }
+
+            LineEdit {
+                id: checkProofMessageLine
+                fontSize: mainLayout.lineEditFontSize
+                placeholderText: qsTr("Optional message against which the signature is signed") + translationManager.emptyString;
+                readOnly: false
+                width: mainLayout.editWidth
+                Layout.fillWidth: true
+
+                IconButton {
+                    imageSource: "../images/copyToClipboard.png"
+                    onClicked: {
+                        if (checkProofMessageLine.text.length > 0) {
+                            clipboard.setText(checkProofMessageLine.text)
+                        }
+                    }
+                }
+            }
+        }
+
+        RowLayout {
+            Label {
+                fontSize: 14
+                text: qsTr("Signature") + translationManager.emptyString
+                width: mainLayout.labelWidth
+            }
+
+
+            LineEdit {
+                id: checkProofSignatureLine
+                fontSize: mainLayout.lineEditFontSize
+                placeholderText: qsTr("Paste tx proof") + translationManager.emptyString;
+                readOnly: false
+
+                width: mainLayout.editWidth
+                Layout.fillWidth: true
+
+                IconButton {
+                    imageSource: "../images/copyToClipboard.png"
+                    onClicked: {
+                        if (checkProofSignatureLine.text.length > 0) {
+                            clipboard.setText(checkProofSignatureLine.text)
                         }
                     }
                 }
@@ -208,9 +306,7 @@ Rectangle {
         }
 
         StandardButton {
-            id: checkButton
             anchors.left: parent.left
-            anchors.top: txKeyRow.bottom
             anchors.topMargin: 17
             width: 60
             text: qsTr("Check") + translationManager.emptyString
@@ -218,13 +314,28 @@ Rectangle {
             shadowPressedColor: "#B32D00"
             releasedColor: "#FF6C3C"
             pressedColor: "#FF4304"
-            enabled: checkAddress(addressLine.text, appWindow.persistentSettings.testnet) && checkTxID(txIdLine.text) && checkTxKey(txKeyLine.text)
+            enabled: checkTxID(checkProofTxIdLine.text) && checkAddress(checkProofAddressLine.text, appWindow.persistentSettings.testnet) && checkSignature(checkProofSignatureLine.text)
             onClicked: {
-                console.log("TxKey: Check clicked: address " + addressLine.text + ", txid " << txIdLine.text + ", tx key " + txKeyLine.text);
-                root.checkPaymentClicked(addressLine.text, txIdLine.text, txKeyLine.text)
+                console.log("checkProof: Check clicked: txid " + checkProofTxIdLine.text + ", address " + checkProofAddressLine.text + ", message " + checkProofMessageLine.text + ", signature " + checkProofSignatureLine.text);
+                root.checkProofClicked(checkProofTxIdLine.text, checkProofAddressLine.text, checkProofMessageLine.text, checkProofSignatureLine.text)
             }
         }
 
+        // underline
+        Rectangle {
+            height: 1
+            color: "#DBDBDB"
+            Layout.fillWidth: true
+            Layout.alignment: Qt.AlignHCenter
+            anchors.bottomMargin: 3
+
+        }
+
+        Text {
+            text: qsTr("If a payment had several transactions then each must be checked and the results combined.") + translationManager.emptyString
+            wrapMode: Text.Wrap
+            Layout.fillWidth: true;
+        }
     }
 
     function onPageCompleted() {
diff --git a/src/libwalletqt/Wallet.cpp b/src/libwalletqt/Wallet.cpp
index e5ffef82..38702e23 100644
--- a/src/libwalletqt/Wallet.cpp
+++ b/src/libwalletqt/Wallet.cpp
@@ -494,6 +494,36 @@ QString Wallet::getTxKey(const QString &txid) const
   return QString::fromStdString(m_walletImpl->getTxKey(txid.toStdString()));
 }
 
+QString Wallet::checkTxKey(const QString &txid, const QString &tx_key, const QString &address)
+{
+    uint64_t received;
+    bool in_pool;
+    uint64_t confirmations;
+    bool success = m_walletImpl->checkTxKey(txid.toStdString(), tx_key.toStdString(), address.toStdString(), received, in_pool, confirmations);
+    std::string result = std::string(success ? "true" : "false") + "|" + QString::number(received).toStdString() + "|" + std::string(in_pool ? "true" : "false") + "|" + QString::number(confirmations).toStdString();
+    return QString::fromStdString(result);
+}
+
+QString Wallet::getTxProof(const QString &txid, const QString &address, const QString &message) const
+{
+    std::string error_str;
+    QString result = QString::fromStdString(m_walletImpl->getTxProof(txid.toStdString(), address.toStdString(), message.toStdString(), error_str));
+    if (!error_str.empty())
+        result = QString::fromStdString("error|" + error_str);
+    return result;
+}
+
+QString Wallet::checkTxProof(const QString &txid, const QString &address, const QString &message, const QString &signature)
+{
+    bool good;
+    uint64_t received;
+    bool in_pool;
+    uint64_t confirmations;
+    bool success = m_walletImpl->checkTxProof(txid.toStdString(), address.toStdString(), message.toStdString(), signature.toStdString(), good, received, in_pool, confirmations);
+    std::string result = std::string(success ? "true" : "false") + "|" + std::string(good ? "true" : "false") + "|" + QString::number(received).toStdString() + "|" + std::string(in_pool ? "true" : "false") + "|" + QString::number(confirmations).toStdString();
+    return QString::fromStdString(result);
+}
+
 QString Wallet::signMessage(const QString &message, bool filename) const
 {
   if (filename) {
diff --git a/src/libwalletqt/Wallet.h b/src/libwalletqt/Wallet.h
index adc7d338..c653b8df 100644
--- a/src/libwalletqt/Wallet.h
+++ b/src/libwalletqt/Wallet.h
@@ -232,6 +232,9 @@ public:
     Q_INVOKABLE bool setUserNote(const QString &txid, const QString &note);
     Q_INVOKABLE QString getUserNote(const QString &txid) const;
     Q_INVOKABLE QString getTxKey(const QString &txid) const;
+    Q_INVOKABLE QString checkTxKey(const QString &txid, const QString &tx_key, const QString &address);
+    Q_INVOKABLE QString getTxProof(const QString &txid, const QString &address, const QString &message) const;
+    Q_INVOKABLE QString checkTxProof(const QString &txid, const QString &address, const QString &message, const QString &signature);
     // Rescan spent outputs
     Q_INVOKABLE bool rescanSpent();
 
diff --git a/src/libwalletqt/WalletManager.cpp b/src/libwalletqt/WalletManager.cpp
index a8346478..3d9501ce 100644
--- a/src/libwalletqt/WalletManager.cpp
+++ b/src/libwalletqt/WalletManager.cpp
@@ -216,16 +216,6 @@ QString WalletManager::paymentIdFromAddress(const QString &address, bool testnet
     return QString::fromStdString(Monero::Wallet::paymentIdFromAddress(address.toStdString(), testnet));
 }
 
-QString WalletManager::checkPayment(const QString &address, const QString &txid, const QString &txkey, const QString &daemon_address) const
-{
-    uint64_t received = 0, height = 0;
-    std::string error = "";
-    bool ret = m_pimpl->checkPayment(address.toStdString(), txid.toStdString(), txkey.toStdString(), daemon_address.toStdString(), received, height, error);
-    // bypass qml being unable to pass structures without preposterous complexity
-    std::string result = std::string(ret ? "true" : "false") + "|" + QString::number(received).toStdString() + "|" + QString::number(height).toStdString() + "|" + error;
-    return QString::fromStdString(result);
-}
-
 void WalletManager::setDaemonAddress(const QString &address)
 {
     m_pimpl->setDaemonAddress(address.toStdString());
diff --git a/src/libwalletqt/WalletManager.h b/src/libwalletqt/WalletManager.h
index 69c63b05..4598e07a 100644
--- a/src/libwalletqt/WalletManager.h
+++ b/src/libwalletqt/WalletManager.h
@@ -104,8 +104,6 @@ public:
 
     Q_INVOKABLE QString paymentIdFromAddress(const QString &address, bool testnet) const;
 
-    Q_INVOKABLE QString checkPayment(const QString &address, const QString &txid, const QString &txkey, const QString &daemon_address) const;
-
     Q_INVOKABLE void setDaemonAddress(const QString &address);
     Q_INVOKABLE bool connected() const;
     Q_INVOKABLE quint64 networkDifficulty() const;