diff --git a/native/account/registration/connect-ethereum.react.js b/native/account/registration/connect-ethereum.react.js
--- a/native/account/registration/connect-ethereum.react.js
+++ b/native/account/registration/connect-ethereum.react.js
@@ -19,7 +19,10 @@
 import RegistrationContentContainer from './registration-content-container.react.js';
 import type { RegistrationNavigationProp } from './registration-navigator.react.js';
 import type { CoolOrNerdMode } from './registration-types.js';
-import type { NavigationRoute } from '../../navigation/route-names.js';
+import {
+  type NavigationRoute,
+  ExistingEthereumAccountRouteName,
+} from '../../navigation/route-names.js';
 import { useStyles } from '../../themes/colors.js';
 import EthereumLogoDark from '../../vectors/ethereum-logo-dark.react.js';
 import SIWEPanel from '../siwe-panel.react.js';
@@ -111,6 +114,7 @@
   const exactSearchUserCall = useServerCall(exactSearchUser);
   const dispatchActionPromise = useDispatchActionPromise();
 
+  const { navigate } = props.navigation;
   const onSuccessfulWalletSignature = React.useCallback(
     async (result: SIWEResult) => {
       const searchPromise = exactSearchUserCall(result.address);
@@ -118,12 +122,16 @@
       const { userInfo } = await searchPromise;
 
       if (userInfo) {
-        // show duplicate account screen
+        const { message, signature } = result;
+        navigate<'ExistingEthereumAccount'>({
+          name: ExistingEthereumAccountRouteName,
+          params: { message, signature },
+        });
       } else {
         // show avatar selection screen
       }
     },
-    [exactSearchUserCall, dispatchActionPromise],
+    [exactSearchUserCall, dispatchActionPromise, navigate],
   );
 
   let siwePanel;
@@ -144,7 +152,7 @@
       <RegistrationContainer>
         <RegistrationContentContainer style={styles.scrollViewContentContainer}>
           <Text style={styles.header}>
-            Do you want to connect an Ethereum Wallet to your account?
+            Do you want to connect an Ethereum wallet?
           </Text>
           {body}
           <View style={styles.ethereumLogoContainer}>
diff --git a/native/account/registration/existing-ethereum-account.react.js b/native/account/registration/existing-ethereum-account.react.js
new file mode 100644
--- /dev/null
+++ b/native/account/registration/existing-ethereum-account.react.js
@@ -0,0 +1,71 @@
+// @flow
+
+import * as React from 'react';
+import { Text } from 'react-native';
+
+import RegistrationButtonContainer from './registration-button-container.react.js';
+import RegistrationButton from './registration-button.react.js';
+import RegistrationContainer from './registration-container.react.js';
+import RegistrationContentContainer from './registration-content-container.react.js';
+import type { RegistrationNavigationProp } from './registration-navigator.react.js';
+import type { NavigationRoute } from '../../navigation/route-names.js';
+import { useStyles } from '../../themes/colors.js';
+
+export type ExistingEthereumAccountParams = {
+  +message: string,
+  +signature: string,
+};
+
+type Props = {
+  +navigation: RegistrationNavigationProp<'ExistingEthereumAccount'>,
+  +route: NavigationRoute<'ExistingEthereumAccount'>,
+};
+function ExistingEthereumAccount(props: Props): React.Node {
+  const styles = useStyles(unboundStyles);
+
+  const { goBack } = props.navigation;
+
+  const onProceedToLogIn = React.useCallback(() => {}, []);
+
+  return (
+    <RegistrationContainer>
+      <RegistrationContentContainer>
+        <Text style={styles.header}>
+          Account already exists for Ethereum wallet
+        </Text>
+        <Text style={styles.body}>
+          You can proceed to log in with this wallet, or go back and use a
+          different wallet.
+        </Text>
+      </RegistrationContentContainer>
+      <RegistrationButtonContainer>
+        <RegistrationButton
+          onPress={onProceedToLogIn}
+          label="Log in to account"
+          variant="enabled"
+        />
+        <RegistrationButton
+          onPress={goBack}
+          label="Use a different wallet"
+          variant="outline"
+        />
+      </RegistrationButtonContainer>
+    </RegistrationContainer>
+  );
+}
+
+const unboundStyles = {
+  header: {
+    fontSize: 24,
+    color: 'panelForegroundLabel',
+    paddingBottom: 16,
+  },
+  body: {
+    fontSize: 15,
+    lineHeight: 20,
+    color: 'panelForegroundSecondaryLabel',
+    paddingBottom: 16,
+  },
+};
+
+export default ExistingEthereumAccount;
diff --git a/native/account/registration/registration-navigator.react.js b/native/account/registration/registration-navigator.react.js
--- a/native/account/registration/registration-navigator.react.js
+++ b/native/account/registration/registration-navigator.react.js
@@ -9,12 +9,14 @@
 
 import ConnectEthereum from './connect-ethereum.react.js';
 import CoolOrNerdModeSelection from './cool-or-nerd-mode-selection.react.js';
+import ExistingEthereumAccount from './existing-ethereum-account.react.js';
 import KeyserverSelection from './keyserver-selection.react.js';
 import type { RootNavigationProp } from '../../navigation/root-navigator.react.js';
 import {
   KeyserverSelectionRouteName,
   CoolOrNerdModeSelectionRouteName,
   ConnectEthereumRouteName,
+  ExistingEthereumAccountRouteName,
   type ScreenParamList,
   type RegistrationParamList,
 } from '../../navigation/route-names.js';
@@ -59,6 +61,10 @@
         name={ConnectEthereumRouteName}
         component={ConnectEthereum}
       />
+      <Registration.Screen
+        name={ExistingEthereumAccountRouteName}
+        component={ExistingEthereumAccount}
+      />
     </Registration.Navigator>
   );
 }
diff --git a/native/navigation/route-names.js b/native/navigation/route-names.js
--- a/native/navigation/route-names.js
+++ b/native/navigation/route-names.js
@@ -5,6 +5,7 @@
 import type { ActionResultModalParams } from './action-result-modal.react.js';
 import type { InviteLinkModalParams } from './invite-link-modal.react';
 import type { ConnectEthereumParams } from '../account/registration/connect-ethereum.react.js';
+import type { ExistingEthereumAccountParams } from '../account/registration/existing-ethereum-account.react.js';
 import type { KeyserverSelectionParams } from '../account/registration/keyserver-selection.react.js';
 import type { TermsAndPrivacyModalParams } from '../account/terms-and-privacy-modal.react.js';
 import type { ThreadPickerModalParams } from '../calendar/thread-picker-modal.react.js';
@@ -95,6 +96,7 @@
 export const KeyserverSelectionRouteName = 'KeyserverSelection';
 export const CoolOrNerdModeSelectionRouteName = 'CoolOrNerdModeSelection';
 export const ConnectEthereumRouteName = 'ConnectEthereum';
+export const ExistingEthereumAccountRouteName = 'ExistingEthereumAccount';
 
 export type RootParamList = {
   +LoggedOutModal: void,
@@ -186,6 +188,7 @@
   +CoolOrNerdModeSelection: void,
   +KeyserverSelection: KeyserverSelectionParams,
   +ConnectEthereum: ConnectEthereumParams,
+  +ExistingEthereumAccount: ExistingEthereumAccountParams,
 };
 
 export type ScreenParamList = {