diff --git a/electrum/gui/qml/components/wizard/WCConfirmExt.qml b/electrum/gui/qml/components/wizard/WCConfirmExt.qml
new file mode 100644
index 000000000..abcfc3130
--- /dev/null
+++ b/electrum/gui/qml/components/wizard/WCConfirmExt.qml
@@ -0,0 +1,72 @@
+import QtQuick
+import QtQuick.Layouts
+import QtQuick.Controls
+import QtQuick.Controls.Material
+
+import org.electrum 1.0
+
+import "../controls"
+
+WizardComponent {
+    id: root
+    securePage: true
+
+    valid: false
+
+    property int cosigner: 0
+
+    function checkValid() {
+        valid = false
+        var input = customwordstext.text
+        if (input == '') {
+            return
+        }
+
+        if (cosigner) {
+            // multisig cosigner
+            if (input != wizard_data['multisig_cosigner_data'][cosigner.toString()]['seed_extra_words']) {
+                return
+            }
+        } else {
+            if (input != wizard_data['seed_extra_words']) {
+                return
+            }
+        }
+        valid = true
+    }
+
+    Flickable {
+        anchors.fill: parent
+        contentHeight: mainLayout.height
+        clip: true
+        interactive: height < contentHeight
+
+        ColumnLayout {
+            id: mainLayout
+            width: parent.width
+            spacing: constants.paddingLarge
+
+            Label {
+                Layout.fillWidth: true
+                wrapMode: Text.Wrap
+                text: qsTr('Please enter your custom word(s) a second time:')
+            }
+
+            TextField {
+                id: customwordstext
+                Layout.fillWidth: true
+                Layout.columnSpan: 2
+                placeholderText: qsTr('Enter your custom word(s) here')
+                inputMethodHints: Qt.ImhSensitiveData | Qt.ImhNoPredictiveText | Qt.ImhNoAutoUppercase
+                onTextChanged: checkValid()
+            }
+        }
+    }
+
+    Component.onCompleted: {
+        if (wizard_data['wallet_type'] == 'multisig') {
+            if ('multisig_current_cosigner' in wizard_data)
+                cosigner = wizard_data['multisig_current_cosigner']
+        }
+    }
+}
\ No newline at end of file
diff --git a/electrum/gui/qml/components/wizard/WCConfirmSeed.qml b/electrum/gui/qml/components/wizard/WCConfirmSeed.qml
index a5f27d8e0..a2b058e95 100644
--- a/electrum/gui/qml/components/wizard/WCConfirmSeed.qml
+++ b/electrum/gui/qml/components/wizard/WCConfirmSeed.qml
@@ -14,8 +14,7 @@ WizardComponent {
 
     function checkValid() {
         var seedvalid = wizard.wiz.isMatchingSeed(wizard_data['seed'], confirm.text)
-        var customwordsvalid =  customwordstext.text == wizard_data['seed_extra_words']
-        valid = seedvalid && (wizard_data['seed_extend'] ? customwordsvalid : true)
+        valid = seedvalid
     }
 
     Flickable {
@@ -46,19 +45,6 @@ WizardComponent {
                 placeholderText: qsTr('Enter your seed')
                 onTextChanged: checkValid()
             }
-
-            TextField {
-                id: customwordstext
-                Layout.fillWidth: true
-                placeholderText: qsTr('Enter your custom word(s)')
-                inputMethodHints: Qt.ImhNoPredictiveText
-
-                onTextChanged: checkValid()
-            }
         }
     }
-
-    Component.onCompleted: {
-        customwordstext.visible = wizard_data['seed_extend']
-    }
 }
diff --git a/electrum/gui/qml/components/wizard/WCCreateSeed.qml b/electrum/gui/qml/components/wizard/WCCreateSeed.qml
index da087706a..efa4df90a 100644
--- a/electrum/gui/qml/components/wizard/WCCreateSeed.qml
+++ b/electrum/gui/qml/components/wizard/WCCreateSeed.qml
@@ -9,13 +9,12 @@ import "../controls"
 WizardComponent {
     securePage: true
 
-    valid: seedtext.text != '' && extendcb.checked ? customwordstext.text != '' : true
+    valid: seedtext.text != ''
 
     function apply() {
         wizard_data['seed'] = seedtext.text
         wizard_data['seed_variant'] = 'electrum' // generated seed always electrum variant
-        wizard_data['seed_extend'] = extendcb.checked
-        wizard_data['seed_extra_words'] = extendcb.checked ? customwordstext.text : ''
+        wizard_data['seed_extend'] = true  // true so we get forwarded to the passphrase page
     }
 
     function setWarningText(numwords) {
@@ -70,20 +69,6 @@ WizardComponent {
                 }
             }
 
-            ElCheckBox {
-                id: extendcb
-                Layout.fillWidth: true
-                text: qsTr('Extend seed with custom words')
-            }
-
-            TextField {
-                id: customwordstext
-                visible: extendcb.checked
-                Layout.fillWidth: true
-                placeholderText: qsTr('Enter your custom word(s)')
-                inputMethodHints: Qt.ImhNoPredictiveText
-            }
-
             Component.onCompleted : {
                 setWarningText(12)
             }
diff --git a/electrum/gui/qml/components/wizard/WCEnterExt.qml b/electrum/gui/qml/components/wizard/WCEnterExt.qml
new file mode 100644
index 000000000..b804f09ab
--- /dev/null
+++ b/electrum/gui/qml/components/wizard/WCEnterExt.qml
@@ -0,0 +1,119 @@
+import QtQuick
+import QtQuick.Layouts
+import QtQuick.Controls
+import QtQuick.Controls.Material
+
+import org.electrum 1.0
+
+import "../controls"
+
+WizardComponent {
+    id: root
+    securePage: true
+
+    valid: true
+
+    property int cosigner: 0
+
+    function apply() {
+        var seed_extend = extendcb.checked
+        if (cosigner) {
+            wizard_data['multisig_cosigner_data'][cosigner.toString()]['seed_extend'] = seed_extend
+            wizard_data['multisig_cosigner_data'][cosigner.toString()]['seed_extra_words'] = seed_extend ? customwordstext.text : ''
+        } else {
+            wizard_data['seed_extend'] = seed_extend
+            wizard_data['seed_extra_words'] = seed_extend ? customwordstext.text : ''
+        }
+    }
+
+    function checkValid() {
+        valid = false
+        validationtext.text = ''
+
+        if (extendcb.checked && customwordstext.text == '') {
+            return
+        } else {
+            // passphrase is either disabled or filled with text
+            apply()
+            if (cosigner && wizard_data['multisig_cosigner_data'][cosigner.toString()]['seed_variant'] == 'electrum') {
+                // check if master keys are not duplicated after entering passphrase
+                if (wiz.hasDuplicateMasterKeys(wizard_data)) {
+                    validationtext.text = qsTr('Error: duplicate master public key')
+                    return
+                }
+            }
+        }
+        valid = true
+    }
+
+    Flickable {
+        anchors.fill: parent
+        contentHeight: mainLayout.height
+        clip: true
+        interactive: height < contentHeight
+
+        ColumnLayout {
+            id: mainLayout
+            width: parent.width
+            spacing: constants.paddingLarge
+
+            InfoTextArea {
+                id: validationtext
+                Layout.fillWidth: true
+                Layout.columnSpan: 2
+                visible: text
+                iconStyle: InfoTextArea.IconStyle.Error
+            }
+
+            Label {
+                Layout.fillWidth: true
+                wrapMode: Text.Wrap
+                text: [
+                    qsTr('You may extend your seed with custom words.'),
+                    qsTr('Your seed extension must be saved together with your seed.'),
+                    qsTr('Note that this is NOT your encryption password.'),
+                    '<br/>',
+                    qsTr('Do not enable it unless you know what it does!'),
+                ].join(' ')
+            }
+
+            ElCheckBox {
+                id: extendcb
+                Layout.columnSpan: 2
+                Layout.fillWidth: true
+                text: qsTr('Extend seed with custom words')
+                onCheckedChanged: checkValid()
+            }
+
+            TextField {
+                id: customwordstext
+                enabled: extendcb.checked
+                Layout.fillWidth: true
+                Layout.columnSpan: 2
+                placeholderText: qsTr('Enter your custom word(s)')
+                inputMethodHints: Qt.ImhSensitiveData | Qt.ImhNoPredictiveText | Qt.ImhNoAutoUppercase
+                onTextChanged: startValidationTimer()
+            }
+        }
+    }
+
+    function startValidationTimer() {
+        valid = false
+        validationTimer.restart()
+    }
+
+    Timer {
+        id: validationTimer
+        interval: 250
+        repeat: false
+        onTriggered: checkValid()
+    }
+
+    Component.onCompleted: {
+        if (wizard_data['wallet_type'] == 'multisig') {
+            if ('multisig_current_cosigner' in wizard_data)
+                cosigner = wizard_data['multisig_current_cosigner']
+        }
+        checkValid()
+    }
+}
diff --git a/electrum/gui/qml/components/wizard/WCHaveSeed.qml b/electrum/gui/qml/components/wizard/WCHaveSeed.qml
index 4afc638a7..3be2a29d5 100644
--- a/electrum/gui/qml/components/wizard/WCHaveSeed.qml
+++ b/electrum/gui/qml/components/wizard/WCHaveSeed.qml
@@ -24,19 +24,16 @@ WizardComponent {
     property bool _seedValid
 
     function apply() {
-        var seed_extend = extendcb.checked && _canPassphrase
         if (cosigner) {
             wizard_data['multisig_cosigner_data'][cosigner.toString()]['seed'] = seedtext.text
             wizard_data['multisig_cosigner_data'][cosigner.toString()]['seed_variant'] = seed_variant_cb.currentValue
             wizard_data['multisig_cosigner_data'][cosigner.toString()]['seed_type'] = _seedType
-            wizard_data['multisig_cosigner_data'][cosigner.toString()]['seed_extend'] = seed_extend
-            wizard_data['multisig_cosigner_data'][cosigner.toString()]['seed_extra_words'] = seed_extend ? customwordstext.text : ''
+            wizard_data['multisig_cosigner_data'][cosigner.toString()]['seed_extend'] = _canPassphrase
         } else {
             wizard_data['seed'] = seedtext.text
             wizard_data['seed_variant'] = seed_variant_cb.currentValue
             wizard_data['seed_type'] = _seedType
-            wizard_data['seed_extend'] = seed_extend
-            wizard_data['seed_extra_words'] = seed_extend ? customwordstext.text : ''
+            wizard_data['seed_extend'] = _canPassphrase
 
             // determine script type from electrum seed type
             // (used to limit script type options for bip39 cosigners)
@@ -52,22 +49,20 @@ WizardComponent {
     function setSeedTypeHelpText() {
         var t = {
             'electrum': [
+                // not shown as electrum is the default seed type anyways and the name is self-explanatory
                 qsTr('Electrum seeds are the default seed type.'),
                 qsTr('If you are restoring from a seed previously created by Electrum, choose this option')
             ].join(' '),
             'bip39': [
                 qsTr('BIP39 seeds can be imported in Electrum, so that users can access funds locked in other wallets.'),
-                '<br/><br/>',
-                qsTr('However, we do not generate BIP39 seeds, because they do not meet our safety standard.'),
-                qsTr('BIP39 seeds do not include a version number, which compromises compatibility with future software.')
+                qsTr('BIP39 seeds do not include a version number, which compromises compatibility with future software.'),
             ].join(' '),
             'slip39': [
                 qsTr('SLIP39 seeds can be imported in Electrum, so that users can access funds locked in other wallets.'),
-                '<br/><br/>',
-                qsTr('However, we do not generate SLIP39 seeds.')
             ].join(' ')
         }
         infotext.text = t[seed_variant_cb.currentValue]
+        infotext.visible = !cosigner && !is2fa && seed_variant_cb.currentValue != 'electrum'
     }
 
     function checkValid() {
@@ -100,11 +95,6 @@ WizardComponent {
             }
         }
 
-        if (_canPassphrase && extendcb.checked && customwordstext.text == '') {
-            valid = false
-            return
-        }
-
         valid = _seedValid
     }
 
@@ -196,7 +186,6 @@ WizardComponent {
 
             InfoTextArea {
                 id: infotext
-                visible: !cosigner && !is2fa
                 Layout.fillWidth: true
                 Layout.columnSpan: 2
                 Layout.bottomMargin: constants.paddingLarge
@@ -221,26 +210,6 @@ WizardComponent {
                     startValidationTimer()
                 }
             }
-
-            ElCheckBox {
-                id: extendcb
-                Layout.columnSpan: 2
-                Layout.fillWidth: true
-                visible: _canPassphrase
-                text: qsTr('Extend seed with custom words')
-                onCheckedChanged: startValidationTimer()
-            }
-
-            TextField {
-                id: customwordstext
-                visible: extendcb.checked && extendcb.visible
-                Layout.fillWidth: true
-                Layout.columnSpan: 2
-                placeholderText: qsTr('Enter your custom word(s)')
-                inputMethodHints: Qt.ImhNoPredictiveText
-
-                onTextChanged: startValidationTimer()
-            }
         }
     }
 
diff --git a/electrum/gui/qml/qewizard.py b/electrum/gui/qml/qewizard.py
index 0a9d51fa1..cd45e9e57 100644
--- a/electrum/gui/qml/qewizard.py
+++ b/electrum/gui/qml/qewizard.py
@@ -68,14 +68,18 @@ class QENewWalletWizard(NewWalletWizard, QEAbstractWizard):
             'wallet_type': {'gui': 'WCWalletType'},
             'keystore_type': {'gui': 'WCKeystoreType'},
             'create_seed': {'gui': 'WCCreateSeed'},
+            'create_ext': {'gui': 'WCEnterExt'},
             'confirm_seed': {'gui': 'WCConfirmSeed'},
+            'confirm_ext': {'gui': 'WCConfirmExt'},
             'have_seed': {'gui': 'WCHaveSeed'},
+            'have_ext': {'gui': 'WCEnterExt'},
             'script_and_derivation': {'gui': 'WCScriptAndDerivation'},
             'have_master_key': {'gui': 'WCHaveMasterKey'},
             'multisig': {'gui': 'WCMultisig'},
             'multisig_cosigner_keystore': {'gui': 'WCCosignerKeystore'},
             'multisig_cosigner_key': {'gui': 'WCHaveMasterKey'},
             'multisig_cosigner_seed': {'gui': 'WCHaveSeed'},
+            'multisig_cosigner_have_ext': {'gui': 'WCEnterExt'},
             'multisig_cosigner_script_and_derivation': {'gui': 'WCScriptAndDerivation'},
             'imported': {'gui': 'WCImport'},
             'wallet_password': {'gui': 'WCWalletPassword'}
diff --git a/electrum/wizard.py b/electrum/wizard.py
index 0eb094a59..9092e891f 100644
--- a/electrum/wizard.py
+++ b/electrum/wizard.py
@@ -333,7 +333,7 @@ class KeystoreWizard(AbstractWizard):
 
     def keystore_from_data(self, wallet_type: str, data: dict):
         if data['keystore_type'] in ['createseed', 'haveseed'] and 'seed' in data:
-            seed_extension = data['seed_extra_words'] if data['seed_extend'] else ''
+            seed_extension = data.get('seed_extra_words', '')
             if data['seed_variant'] == 'electrum':
                 for_multisig = wallet_type in ['multisig']
                 return keystore.from_seed(data['seed'], passphrase=seed_extension, for_multisig=for_multisig)