diff --git a/native/account/registration/connect-ethereum.react.js b/native/account/registration/connect-ethereum.react.js
index 8a9771576..f24b7cab1 100644
--- a/native/account/registration/connect-ethereum.react.js
+++ b/native/account/registration/connect-ethereum.react.js
@@ -1,212 +1,220 @@
 // @flow
 
 import * as React from 'react';
 import { Text, View } from 'react-native';
 
 import {
   exactSearchUser,
   exactSearchUserActionTypes,
 } from 'lib/actions/user-actions.js';
 import type { SIWEResult } from 'lib/types/siwe-types.js';
 import {
   useServerCall,
   useDispatchActionPromise,
 } from 'lib/utils/action-utils.js';
 
 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 { 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';
 
 export type ConnectEthereumParams = {
   +userSelections: {
     +coolOrNerdMode: CoolOrNerdMode,
     +keyserverUsername: string,
   },
 };
 
 type PanelState = 'closed' | 'opening' | 'open' | 'closing';
 
 type Props = {
   +navigation: RegistrationNavigationProp<'ConnectEthereum'>,
   +route: NavigationRoute<'ConnectEthereum'>,
 };
 function ConnectEthereum(props: Props): React.Node {
   const isNerdMode =
     props.route.params.userSelections.coolOrNerdMode === 'nerd';
   const styles = useStyles(unboundStyles);
 
   let body;
   if (!isNerdMode) {
     body = (
       <Text style={styles.body}>
         Connecting your Ethereum wallet allows you to use your ENS name and
         avatar in the app. You&apos;ll also be able to log in with your wallet
         instead of a password.
       </Text>
     );
   } else {
     body = (
       <>
         <Text style={styles.body}>
           Connecting your Ethereum wallet has three benefits:
         </Text>
         <View style={styles.list}>
           <View style={styles.listItem}>
             <Text style={styles.listItemNumber}>{'1. '}</Text>
             <Text style={styles.listItemContent}>
               Your peers will be able to cryptographically verify that your Comm
               account is associated with your Ethereum wallet.
             </Text>
           </View>
           <View style={styles.listItem}>
             <Text style={styles.listItemNumber}>{'2. '}</Text>
             <Text style={styles.listItemContent}>
               You&apos;ll be able to use your ENS name and avatar in the app.
             </Text>
           </View>
           <View style={styles.listItem}>
             <Text style={styles.listItemNumber}>{'3. '}</Text>
             <Text style={styles.listItemContent}>
               You can choose to skip setting a password, and to log in with your
               Ethereum wallet instead.
             </Text>
           </View>
         </View>
       </>
     );
   }
 
   const [panelState, setPanelState] = React.useState<PanelState>('closed');
   const openPanel = React.useCallback(() => {
     setPanelState('opening');
   }, []);
   const onPanelClosed = React.useCallback(() => {
     setPanelState('closed');
   }, []);
   const onPanelClosing = React.useCallback(() => {
     setPanelState('closing');
   }, []);
 
   const siwePanelSetLoading = React.useCallback(
     (loading: boolean) => {
       if (panelState === 'closing' || panelState === 'closed') {
         return;
       }
       setPanelState(loading ? 'opening' : 'open');
     },
     [panelState],
   );
 
   const onSkip = React.useCallback(() => {
     // show username selection screen
   }, []);
 
   const exactSearchUserCall = useServerCall(exactSearchUser);
   const dispatchActionPromise = useDispatchActionPromise();
 
+  const { navigate } = props.navigation;
   const onSuccessfulWalletSignature = React.useCallback(
     async (result: SIWEResult) => {
       const searchPromise = exactSearchUserCall(result.address);
       dispatchActionPromise(exactSearchUserActionTypes, searchPromise);
       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;
   if (panelState !== 'closed') {
     siwePanel = (
       <SIWEPanel
         onClosing={onPanelClosing}
         onClosed={onPanelClosed}
         closing={panelState === 'closing'}
         onSuccessfulWalletSignature={onSuccessfulWalletSignature}
         setLoading={siwePanelSetLoading}
       />
     );
   }
 
   return (
     <>
       <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}>
             <EthereumLogoDark />
           </View>
         </RegistrationContentContainer>
         <RegistrationButtonContainer>
           <RegistrationButton
             onPress={openPanel}
             label="Connect Ethereum wallet"
             variant={panelState === 'opening' ? 'loading' : 'enabled'}
           />
           <RegistrationButton
             onPress={onSkip}
             label="Do not connect"
             variant="outline"
           />
         </RegistrationButtonContainer>
       </RegistrationContainer>
       {siwePanel}
     </>
   );
 }
 
 const unboundStyles = {
   scrollViewContentContainer: {
     flexGrow: 1,
   },
   header: {
     fontSize: 24,
     color: 'panelForegroundLabel',
     paddingBottom: 16,
   },
   body: {
     fontSize: 15,
     lineHeight: 20,
     color: 'panelForegroundSecondaryLabel',
     paddingBottom: 16,
   },
   ethereumLogoContainer: {
     flexGrow: 1,
     alignItems: 'center',
     justifyContent: 'center',
   },
   list: {
     paddingBottom: 16,
   },
   listItem: {
     flexDirection: 'row',
   },
   listItemNumber: {
     fontWeight: 'bold',
     fontSize: 15,
     lineHeight: 20,
     color: 'panelForegroundSecondaryLabel',
   },
   listItemContent: {
     flexShrink: 1,
     fontSize: 15,
     lineHeight: 20,
     color: 'panelForegroundSecondaryLabel',
   },
 };
 
 export default ConnectEthereum;
diff --git a/native/account/registration/existing-ethereum-account.react.js b/native/account/registration/existing-ethereum-account.react.js
new file mode 100644
index 000000000..525ab4f2f
--- /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
index f00b08e30..b0d932c34 100644
--- a/native/account/registration/registration-navigator.react.js
+++ b/native/account/registration/registration-navigator.react.js
@@ -1,66 +1,72 @@
 // @flow
 
 import {
   createStackNavigator,
   type StackNavigationProp,
   type StackNavigationHelpers,
 } from '@react-navigation/stack';
 import * as React from 'react';
 
 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';
 
 export type RegistrationNavigationProp<
   RouteName: $Keys<RegistrationParamList> = $Keys<RegistrationParamList>,
 > = StackNavigationProp<ScreenParamList, RouteName>;
 
 const Registration = createStackNavigator<
   ScreenParamList,
   RegistrationParamList,
   StackNavigationHelpers<ScreenParamList>,
 >();
 
 const screenOptions = {
   headerTransparent: true,
   headerBackTitleVisible: false,
   headerTitle: '',
   headerTintColor: 'white',
   headerLeftContainerStyle: {
     paddingLeft: 12,
   },
 };
 
 type Props = {
   +navigation: RootNavigationProp<'Registration'>,
   ...
 };
 // eslint-disable-next-line no-unused-vars
 function RegistrationNavigator(props: Props): React.Node {
   return (
     <Registration.Navigator screenOptions={screenOptions}>
       <Registration.Screen
         name={CoolOrNerdModeSelectionRouteName}
         component={CoolOrNerdModeSelection}
       />
       <Registration.Screen
         name={KeyserverSelectionRouteName}
         component={KeyserverSelection}
       />
       <Registration.Screen
         name={ConnectEthereumRouteName}
         component={ConnectEthereum}
       />
+      <Registration.Screen
+        name={ExistingEthereumAccountRouteName}
+        component={ExistingEthereumAccount}
+      />
     </Registration.Navigator>
   );
 }
 
 export default RegistrationNavigator;
diff --git a/native/navigation/route-names.js b/native/navigation/route-names.js
index 9a43382c8..5d4367460 100644
--- a/native/navigation/route-names.js
+++ b/native/navigation/route-names.js
@@ -1,230 +1,233 @@
 // @flow
 
 import type { RouteProp } from '@react-navigation/native';
 
 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';
 import type { ComposeSubchannelParams } from '../chat/compose-subchannel.react.js';
 import type { FullScreenThreadMediaGalleryParams } from '../chat/fullscreen-thread-media-gallery.react.js';
 import type { ImagePasteModalParams } from '../chat/image-paste-modal.react.js';
 import type { MessageListParams } from '../chat/message-list-types.js';
 import type { MessageReactionsModalParams } from '../chat/message-reactions-modal.react.js';
 import type { MessageResultsScreenParams } from '../chat/message-results-screen.react.js';
 import type { MultimediaMessageTooltipModalParams } from '../chat/multimedia-message-tooltip-modal.react.js';
 import type { RobotextMessageTooltipModalParams } from '../chat/robotext-message-tooltip-modal.react.js';
 import type { AddUsersModalParams } from '../chat/settings/add-users-modal.react.js';
 import type { ColorSelectorModalParams } from '../chat/settings/color-selector-modal.react.js';
 import type { ComposeSubchannelModalParams } from '../chat/settings/compose-subchannel-modal.react.js';
 import type { DeleteThreadParams } from '../chat/settings/delete-thread.react.js';
 import type { EmojiThreadAvatarCreationParams } from '../chat/settings/emoji-thread-avatar-creation.react.js';
 import type { ThreadSettingsMemberTooltipModalParams } from '../chat/settings/thread-settings-member-tooltip-modal.react.js';
 import type { ThreadSettingsParams } from '../chat/settings/thread-settings.react.js';
 import type { SidebarListModalParams } from '../chat/sidebar-list-modal.react.js';
 import type { SubchannelListModalParams } from '../chat/subchannels-list-modal.react.js';
 import type { TextMessageTooltipModalParams } from '../chat/text-message-tooltip-modal.react.js';
 import type { TogglePinModalParams } from '../chat/toggle-pin-modal.react.js';
 import type { ChatCameraModalParams } from '../media/chat-camera-modal.react.js';
 import type { ImageModalParams } from '../media/image-modal.react.js';
 import type { ThreadAvatarCameraModalParams } from '../media/thread-avatar-camera-modal.react.js';
 import type { VideoPlaybackModalParams } from '../media/video-playback-modal.react.js';
 import type { CustomServerModalParams } from '../profile/custom-server-modal.react.js';
 import type { RelationshipListItemTooltipModalParams } from '../profile/relationship-list-item-tooltip-modal.react.js';
 
 export const ActionResultModalRouteName = 'ActionResultModal';
 export const AddUsersModalRouteName = 'AddUsersModal';
 export const AppearancePreferencesRouteName = 'AppearancePreferences';
 export const AppRouteName = 'App';
 export const AppsRouteName = 'Apps';
 export const BackgroundChatThreadListRouteName = 'BackgroundChatThreadList';
 export const BlockListRouteName = 'BlockList';
 export const BuildInfoRouteName = 'BuildInfo';
 export const CalendarRouteName = 'Calendar';
 export const ChatCameraModalRouteName = 'ChatCameraModal';
 export const ChatRouteName = 'Chat';
 export const ChatThreadListRouteName = 'ChatThreadList';
 export const ColorSelectorModalRouteName = 'ColorSelectorModal';
 export const ComposeSubchannelModalRouteName = 'ComposeSubchannelModal';
 export const ComposeSubchannelRouteName = 'ComposeSubchannel';
 export const CommunityDrawerNavigatorRouteName = 'CommunityDrawerNavigator';
 export const CustomServerModalRouteName = 'CustomServerModal';
 export const DefaultNotificationsPreferencesRouteName = 'DefaultNotifications';
 export const DeleteAccountRouteName = 'DeleteAccount';
 export const DeleteThreadRouteName = 'DeleteThread';
 export const DevToolsRouteName = 'DevTools';
 export const EditPasswordRouteName = 'EditPassword';
 export const EmojiThreadAvatarCreationRouteName = 'EmojiThreadAvatarCreation';
 export const EmojiUserAvatarCreationRouteName = 'EmojiUserAvatarCreation';
 export const FriendListRouteName = 'FriendList';
 export const FullScreenThreadMediaGalleryRouteName =
   'FullScreenThreadMediaGallery';
 export const HomeChatThreadListRouteName = 'HomeChatThreadList';
 export const ImageModalRouteName = 'ImageModal';
 export const ImagePasteModalRouteName = 'ImagePasteModal';
 export const InviteLinkModalRouteName = 'InviteLinkModal';
 export const LoggedOutModalRouteName = 'LoggedOutModal';
 export const MessageListRouteName = 'MessageList';
 export const MessageReactionsModalRouteName = 'MessageReactionsModal';
 export const MessageResultsScreenRouteName = 'MessageResultsScreen';
 export const MultimediaMessageTooltipModalRouteName =
   'MultimediaMessageTooltipModal';
 export const PrivacyPreferencesRouteName = 'PrivacyPreferences';
 export const ProfileRouteName = 'Profile';
 export const ProfileScreenRouteName = 'ProfileScreen';
 export const RelationshipListItemTooltipModalRouteName =
   'RelationshipListItemTooltipModal';
 export const RobotextMessageTooltipModalRouteName =
   'RobotextMessageTooltipModal';
 export const SidebarListModalRouteName = 'SidebarListModal';
 export const SubchannelsListModalRouteName = 'SubchannelsListModal';
 export const TabNavigatorRouteName = 'TabNavigator';
 export const TextMessageTooltipModalRouteName = 'TextMessageTooltipModal';
 export const ThreadAvatarCameraModalRouteName = 'ThreadAvatarCameraModal';
 export const ThreadPickerModalRouteName = 'ThreadPickerModal';
 export const ThreadSettingsMemberTooltipModalRouteName =
   'ThreadSettingsMemberTooltipModal';
 export const ThreadSettingsRouteName = 'ThreadSettings';
 export const UserAvatarCameraModalRouteName = 'UserAvatarCameraModal';
 export const TogglePinModalRouteName = 'TogglePinModal';
 export const VideoPlaybackModalRouteName = 'VideoPlaybackModal';
 export const TermsAndPrivacyRouteName = 'TermsAndPrivacyModal';
 export const RegistrationRouteName = 'Registration';
 export const KeyserverSelectionRouteName = 'KeyserverSelection';
 export const CoolOrNerdModeSelectionRouteName = 'CoolOrNerdModeSelection';
 export const ConnectEthereumRouteName = 'ConnectEthereum';
+export const ExistingEthereumAccountRouteName = 'ExistingEthereumAccount';
 
 export type RootParamList = {
   +LoggedOutModal: void,
   +App: void,
   +ThreadPickerModal: ThreadPickerModalParams,
   +AddUsersModal: AddUsersModalParams,
   +CustomServerModal: CustomServerModalParams,
   +ColorSelectorModal: ColorSelectorModalParams,
   +ComposeSubchannelModal: ComposeSubchannelModalParams,
   +SidebarListModal: SidebarListModalParams,
   +ImagePasteModal: ImagePasteModalParams,
   +TermsAndPrivacyModal: TermsAndPrivacyModalParams,
   +SubchannelsListModal: SubchannelListModalParams,
   +MessageReactionsModal: MessageReactionsModalParams,
   +Registration: void,
   +InviteLinkModal: InviteLinkModalParams,
 };
 
 export type MessageTooltipRouteNames =
   | typeof RobotextMessageTooltipModalRouteName
   | typeof MultimediaMessageTooltipModalRouteName
   | typeof TextMessageTooltipModalRouteName;
 
 export const PinnableMessageTooltipRouteNames = [
   TextMessageTooltipModalRouteName,
   MultimediaMessageTooltipModalRouteName,
 ];
 
 export type TooltipModalParamList = {
   +MultimediaMessageTooltipModal: MultimediaMessageTooltipModalParams,
   +TextMessageTooltipModal: TextMessageTooltipModalParams,
   +ThreadSettingsMemberTooltipModal: ThreadSettingsMemberTooltipModalParams,
   +RelationshipListItemTooltipModal: RelationshipListItemTooltipModalParams,
   +RobotextMessageTooltipModal: RobotextMessageTooltipModalParams,
 };
 
 export type OverlayParamList = {
   +CommunityDrawerNavigator: void,
   +ImageModal: ImageModalParams,
   +ActionResultModal: ActionResultModalParams,
   +ChatCameraModal: ChatCameraModalParams,
   +UserAvatarCameraModal: void,
   +ThreadAvatarCameraModal: ThreadAvatarCameraModalParams,
   +VideoPlaybackModal: VideoPlaybackModalParams,
   +TogglePinModal: TogglePinModalParams,
   ...TooltipModalParamList,
 };
 
 export type TabParamList = {
   +Calendar: void,
   +Chat: void,
   +Profile: void,
   +Apps: void,
 };
 
 export type ChatParamList = {
   +ChatThreadList: void,
   +MessageList: MessageListParams,
   +ComposeSubchannel: ComposeSubchannelParams,
   +ThreadSettings: ThreadSettingsParams,
   +EmojiThreadAvatarCreation: EmojiThreadAvatarCreationParams,
   +DeleteThread: DeleteThreadParams,
   +FullScreenThreadMediaGallery: FullScreenThreadMediaGalleryParams,
   +MessageResultsScreen: MessageResultsScreenParams,
 };
 
 export type ChatTopTabsParamList = {
   +HomeChatThreadList: void,
   +BackgroundChatThreadList: void,
 };
 
 export type ProfileParamList = {
   +ProfileScreen: void,
   +EmojiUserAvatarCreation: void,
   +EditPassword: void,
   +DeleteAccount: void,
   +BuildInfo: void,
   +DevTools: void,
   +AppearancePreferences: void,
   +PrivacyPreferences: void,
   +DefaultNotifications: void,
   +FriendList: void,
   +BlockList: void,
 };
 
 export type CommunityDrawerParamList = { +TabNavigator: void };
 
 export type RegistrationParamList = {
   +CoolOrNerdModeSelection: void,
   +KeyserverSelection: KeyserverSelectionParams,
   +ConnectEthereum: ConnectEthereumParams,
+  +ExistingEthereumAccount: ExistingEthereumAccountParams,
 };
 
 export type ScreenParamList = {
   ...RootParamList,
   ...OverlayParamList,
   ...TabParamList,
   ...ChatParamList,
   ...ChatTopTabsParamList,
   ...ProfileParamList,
   ...CommunityDrawerParamList,
   ...RegistrationParamList,
 };
 
 export type NavigationRoute<RouteName: string = $Keys<ScreenParamList>> =
   RouteProp<ScreenParamList, RouteName>;
 
 export const accountModals = [LoggedOutModalRouteName, RegistrationRouteName];
 
 export const scrollBlockingModals = [
   ImageModalRouteName,
   MultimediaMessageTooltipModalRouteName,
   TextMessageTooltipModalRouteName,
   ThreadSettingsMemberTooltipModalRouteName,
   RelationshipListItemTooltipModalRouteName,
   RobotextMessageTooltipModalRouteName,
   VideoPlaybackModalRouteName,
 ];
 
 export const chatRootModals = [
   AddUsersModalRouteName,
   ColorSelectorModalRouteName,
   ComposeSubchannelModalRouteName,
 ];
 
 export const threadRoutes = [
   MessageListRouteName,
   ThreadSettingsRouteName,
   DeleteThreadRouteName,
   ComposeSubchannelRouteName,
   FullScreenThreadMediaGalleryRouteName,
   MessageResultsScreenRouteName,
 ];