diff --git a/native/account/registration/connect-farcaster.react.js b/native/account/registration/connect-farcaster.react.js
index 3e908a951..5746f17c6 100644
--- a/native/account/registration/connect-farcaster.react.js
+++ b/native/account/registration/connect-farcaster.react.js
@@ -1,241 +1,252 @@
 // @flow
 
 import invariant from 'invariant';
 import * as React from 'react';
 import { Alert } from 'react-native';
 
 import { IdentityClientContext } from 'lib/shared/identity-client-context.js';
 import { useIsAppForegrounded } from 'lib/shared/lifecycle-utils.js';
 
+import { siweNonceExpired } from './ethereum-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 { RegistrationContext } from './registration-context.js';
 import type { RegistrationNavigationProp } from './registration-navigator.react.js';
 import type { CoolOrNerdMode } from './registration-types.js';
 import FarcasterPrompt from '../../components/farcaster-prompt.react.js';
 import FarcasterWebView from '../../components/farcaster-web-view.react.js';
 import type { FarcasterWebViewState } from '../../components/farcaster-web-view.react.js';
 import {
   type NavigationRoute,
   ConnectEthereumRouteName,
   AvatarSelectionRouteName,
 } from '../../navigation/route-names.js';
 import { useStaffCanSee } from '../../utils/staff-utils.js';
 
 export type ConnectFarcasterParams = ?{
   +userSelections?: {
     +coolOrNerdMode?: CoolOrNerdMode,
     +keyserverURL?: string,
   },
 };
 
 type Props = {
   +navigation: RegistrationNavigationProp<'ConnectFarcaster'>,
   +route: NavigationRoute<'ConnectFarcaster'>,
 };
 
 function ConnectFarcaster(prop: Props): React.Node {
   const { navigation, route } = prop;
 
   const { navigate } = navigation;
   const userSelections = route.params?.userSelections;
 
   const registrationContext = React.useContext(RegistrationContext);
   invariant(registrationContext, 'registrationContext should be set');
   const {
     cachedSelections,
     setCachedSelections,
     skipEthereumLoginOnce,
     setSkipEthereumLoginOnce,
   } = registrationContext;
 
   const [webViewState, setWebViewState] =
     React.useState<FarcasterWebViewState>('closed');
 
   const { ethereumAccount } = cachedSelections;
   const goToNextStep = React.useCallback(
     (fid?: ?string) => {
       setWebViewState('closed');
 
-      if (!skipEthereumLoginOnce || !ethereumAccount) {
+      const nonceExpired =
+        ethereumAccount && siweNonceExpired(ethereumAccount.nonceTimestamp);
+      if (nonceExpired) {
+        setCachedSelections(oldUserSelections => ({
+          ...oldUserSelections,
+          ethereumAccount: undefined,
+        }));
+      }
+
+      if (!skipEthereumLoginOnce || !ethereumAccount || nonceExpired) {
         navigate<'ConnectEthereum'>({
           name: ConnectEthereumRouteName,
           params: {
             userSelections: {
               ...userSelections,
               farcasterID: fid,
             },
           },
         });
         return;
       }
 
       const newUserSelections = {
         ...userSelections,
         farcasterID: fid,
         accountSelection: ethereumAccount,
       };
       setSkipEthereumLoginOnce(false);
       navigate<'AvatarSelection'>({
         name: AvatarSelectionRouteName,
         params: { userSelections: newUserSelections },
       });
     },
     [
       navigate,
       skipEthereumLoginOnce,
       setSkipEthereumLoginOnce,
       ethereumAccount,
       userSelections,
+      setCachedSelections,
     ],
   );
 
   const onSkip = React.useCallback(() => goToNextStep(), [goToNextStep]);
 
   const identityServiceClient = React.useContext(IdentityClientContext);
   const getFarcasterUsers =
     identityServiceClient?.identityClient.getFarcasterUsers;
   invariant(getFarcasterUsers, 'Could not get getFarcasterUsers');
 
   const [queuedAlert, setQueuedAlert] = React.useState<?{
     +title: string,
     +body: string,
   }>();
 
   const onSuccess = React.useCallback(
     async (fid: string) => {
       try {
         const commFCUsers = await getFarcasterUsers([fid]);
         if (commFCUsers.length > 0 && commFCUsers[0].farcasterID === fid) {
           const commUsername = commFCUsers[0].username;
           setQueuedAlert({
             title: 'Farcaster account already linked',
             body: `That Farcaster account is already linked to ${commUsername}`,
           });
           setWebViewState('closed');
         } else {
           goToNextStep(fid);
           setCachedSelections(oldUserSelections => ({
             ...oldUserSelections,
             farcasterID: fid,
           }));
         }
       } catch (e) {
         setQueuedAlert({
           title: 'Failed to query Comm',
           body:
             'We failed to query Comm to see if that Farcaster account is ' +
             'already linked',
         });
         setWebViewState('closed');
       }
     },
     [goToNextStep, setCachedSelections, getFarcasterUsers],
   );
 
   const isAppForegrounded = useIsAppForegrounded();
   React.useEffect(() => {
     if (!queuedAlert || !isAppForegrounded) {
       return;
     }
     Alert.alert(queuedAlert.title, queuedAlert.body);
     setQueuedAlert(null);
   }, [queuedAlert, isAppForegrounded]);
 
   const { farcasterID } = cachedSelections;
   const alreadyHasConnected = !!farcasterID;
 
   const onPressConnectFarcaster = React.useCallback(() => {
     setWebViewState('opening');
   }, []);
 
   const defaultConnectButtonVariant = alreadyHasConnected
     ? 'outline'
     : 'enabled';
 
   const connectButtonVariant =
     webViewState === 'opening' ? 'loading' : defaultConnectButtonVariant;
 
   const connectButtonText = alreadyHasConnected
     ? 'Connect new Farcaster account'
     : 'Connect Farcaster account';
 
   const onUseAlreadyConnectedAccount = React.useCallback(() => {
     invariant(
       farcasterID,
       'farcasterID should be set in onUseAlreadyConnectedAccount',
     );
     goToNextStep(farcasterID);
   }, [farcasterID, goToNextStep]);
 
   const alreadyConnectedButton = React.useMemo(() => {
     if (!alreadyHasConnected) {
       return null;
     }
 
     return (
       <RegistrationButton
         onPress={onUseAlreadyConnectedAccount}
         label="Use connected Farcaster account"
         variant="enabled"
       />
     );
   }, [alreadyHasConnected, onUseAlreadyConnectedAccount]);
 
   const staffCanSee = useStaffCanSee();
   const skipButton = React.useMemo(() => {
     if (!staffCanSee) {
       return undefined;
     }
     return (
       <RegistrationButton
         onPress={onSkip}
         label="Do not connect"
         variant="outline"
       />
     );
   }, [staffCanSee, onSkip]);
 
   const farcasterPromptTextType = staffCanSee ? 'optional' : 'required';
   const connectFarcaster = React.useMemo(
     () => (
       <RegistrationContainer>
         <RegistrationContentContainer style={styles.scrollViewContentContainer}>
           <FarcasterPrompt textType={farcasterPromptTextType} />
         </RegistrationContentContainer>
         <FarcasterWebView onSuccess={onSuccess} webViewState={webViewState} />
         <RegistrationButtonContainer>
           {alreadyConnectedButton}
           <RegistrationButton
             onPress={onPressConnectFarcaster}
             label={connectButtonText}
             variant={connectButtonVariant}
           />
           {skipButton}
         </RegistrationButtonContainer>
       </RegistrationContainer>
     ),
     [
       alreadyConnectedButton,
       connectButtonText,
       connectButtonVariant,
       onPressConnectFarcaster,
       onSuccess,
       webViewState,
       farcasterPromptTextType,
       skipButton,
     ],
   );
 
   return connectFarcaster;
 }
 
 const styles = {
   scrollViewContentContainer: {
     flexGrow: 1,
   },
 };
 
 export default ConnectFarcaster;
diff --git a/native/account/registration/registration-types.js b/native/account/registration/registration-types.js
index a99aab85b..9a0f82f13 100644
--- a/native/account/registration/registration-types.js
+++ b/native/account/registration/registration-types.js
@@ -1,69 +1,69 @@
 // @flow
 
 import type {
   UpdateUserAvatarRequest,
   ClientAvatar,
 } from 'lib/types/avatar-types.js';
 import type { NativeMediaSelection } from 'lib/types/media-types.js';
 import type { SIWEResult, SIWEBackupSecrets } from 'lib/types/siwe-types.js';
 
 export type CoolOrNerdMode = 'cool' | 'nerd';
 
 export type EthereumAccountSelection = {
   +accountType: 'ethereum',
   ...SIWEResult,
   +avatarURI: ?string,
 };
 
 export type UsernameAccountSelection = {
   +accountType: 'username',
   +username: string,
   +password: string,
 };
 
 export type AccountSelection =
   | EthereumAccountSelection
   | UsernameAccountSelection;
 
 export type AvatarData =
   | {
       +needsUpload: true,
       +mediaSelection: NativeMediaSelection,
       +clientAvatar: ClientAvatar,
     }
   | {
       +needsUpload: false,
       +updateUserAvatarRequest: UpdateUserAvatarRequest,
       +clientAvatar: ClientAvatar,
     };
 
 export type RegistrationServerCallInput = {
   +coolOrNerdMode?: CoolOrNerdMode,
   +keyserverURL?: string,
   +farcasterID: ?string,
   +accountSelection: AccountSelection,
   +avatarData: ?AvatarData,
   +siweBackupSecrets?: ?SIWEBackupSecrets,
   +clearCachedSelections: () => void,
 };
 
 export type CachedUserSelections = {
   +coolOrNerdMode?: CoolOrNerdMode,
   +keyserverURL?: string,
   +username?: string,
   +password?: string,
   +avatarData?: ?AvatarData,
-  +ethereumAccount?: EthereumAccountSelection,
+  +ethereumAccount?: ?EthereumAccountSelection,
   +farcasterID?: string,
   +siweBackupSecrets?: ?SIWEBackupSecrets,
 };
 
 export const ensAvatarSelection: AvatarData = {
   needsUpload: false,
   updateUserAvatarRequest: { type: 'ens' },
   clientAvatar: { type: 'ens' },
 };
 
 export const enableNewRegistrationMode = __DEV__;
 
 export const enableSIWEBackupCreation = __DEV__;