diff --git a/lib/shared/search-utils.js b/lib/shared/search-utils.js
--- a/lib/shared/search-utils.js
+++ b/lib/shared/search-utils.js
@@ -2,7 +2,7 @@
 
 import * as React from 'react';
 
-import { messageID } from './id-utils.js';
+import { messageID, extractFIDFromUserID } from './id-utils.js';
 import SearchIndex from './search-index.js';
 import {
   getContainingThreadID,
@@ -47,6 +47,7 @@
 import { values } from '../utils/objects.js';
 import { useDispatchActionPromise } from '../utils/redux-promise-utils.js';
 import { useSelector } from '../utils/redux-utils.js';
+import { supportsFarcasterDCs } from '../utils/services-utils.js';
 
 const notFriendNotice = 'not friend';
 
@@ -282,6 +283,8 @@
       }) => {
         let notice, alert;
         const username = result.username;
+        const isFarcasterUser =
+          supportsFarcasterDCs && !!extractFIDFromUserID(result.id);
         if (
           relationshipStatus &&
           relationshipBlockedInEitherDirection(relationshipStatus)
@@ -309,6 +312,7 @@
             };
           }
         } else if (
+          !isFarcasterUser &&
           !containingThreadInfo &&
           relationshipStatus !== userRelationshipStatus.FRIEND &&
           result.id !== viewerID
diff --git a/native/chat/message-list-thread-search.react.js b/native/chat/message-list-thread-search.react.js
--- a/native/chat/message-list-thread-search.react.js
+++ b/native/chat/message-list-thread-search.react.js
@@ -4,8 +4,10 @@
 import { Text, View } from 'react-native';
 
 import { useENSNames } from 'lib/hooks/ens-cache.js';
+import { extractFIDFromUserID } from 'lib/shared/id-utils.js';
 import { notFriendNotice } from 'lib/shared/search-utils.js';
 import type { AccountUserInfo, UserListItem } from 'lib/types/user-types.js';
+import { supportsFarcasterDCs } from 'lib/utils/services-utils.js';
 
 import { createTagInput } from '../components/tag-input.react.js';
 import UserList from '../components/user-list.react.js';
@@ -67,7 +69,12 @@
             return;
           }
         }
-        if (nonFriends.has(userInfo.id) || userInfo.id === viewerID) {
+        const isFarcasterUser =
+          supportsFarcasterDCs && !!extractFIDFromUserID(userInfo.id);
+        if (
+          !isFarcasterUser &&
+          (nonFriends.has(userInfo.id) || userInfo.id === viewerID)
+        ) {
           await resolveToUser(userInfo);
           return;
         }
diff --git a/web/chat/chat-thread-composer.react.js b/web/chat/chat-thread-composer.react.js
--- a/web/chat/chat-thread-composer.react.js
+++ b/web/chat/chat-thread-composer.react.js
@@ -14,6 +14,7 @@
   useUsersSupportThickThreads,
 } from 'lib/hooks/user-identities-hooks.js';
 import { userInfoSelectorForPotentialMembers } from 'lib/selectors/user-selectors.js';
+import { extractFIDFromUserID } from 'lib/shared/id-utils.js';
 import {
   usePotentialMemberItems,
   useSearchUsers,
@@ -27,6 +28,7 @@
 import { threadTypes } from 'lib/types/thread-types-enum.js';
 import type { AccountUserInfo, UserListItem } from 'lib/types/user-types.js';
 import { useDispatch } from 'lib/utils/redux-utils.js';
+import { supportsFarcasterDCs } from 'lib/utils/services-utils.js';
 
 import css from './chat-thread-composer.css';
 import UserAvatar from '../avatars/user-avatar.react.js';
@@ -101,7 +103,10 @@
     async (userListItem: UserListItem) => {
       const { alert, notice, disabled, ...user } = userListItem;
       setUsernameInputText('');
+      const isFarcasterUser =
+        supportsFarcasterDCs && !!extractFIDFromUserID(user.id);
       if (
+        !isFarcasterUser &&
         (notice === notFriendNotice || user.id === viewerID) &&
         userInfoInputArray.length === 0
       ) {