diff --git a/src/pages/letterPage/pages/letter-guide-page.tsx b/src/pages/letterPage/pages/letter-guide-page.tsx
index f18e1b5..fc62709 100644
--- a/src/pages/letterPage/pages/letter-guide-page.tsx
+++ b/src/pages/letterPage/pages/letter-guide-page.tsx
@@ -16,19 +16,20 @@ export default function LetterGuidePage({
   const { shareUri } = useParams();
   const location = useLocation();
 
+  const isJoinPage = location.pathname.startsWith("/join/");
+  const isFirstTimeJoin = location.pathname === "/join/letter/guide";
+
   // fetch board info when shareUri is present to get the owner's name
+  // join 페이지에서는 보드 정보를 가져올 필요 없음
   const boardInfoQuery = useQuery({
     queryKey: ["boardInfo", shareUri],
     queryFn: () => getBoardInfo(shareUri ?? ""),
-    enabled: Boolean(shareUri),
+    enabled: Boolean(shareUri) && !isJoinPage,
   });
 
   const computedNickname =
     boardInfoQuery.data?.data?.nickname ?? (nickname as string);
 
-  const isJoinPage = location.pathname.startsWith("/join/");
-  const isFirstTimeJoin = location.pathname === "/join/letter/guide";
-
   const handleSearchClick = () => {
     if (isJoinPage) {
       if (isFirstTimeJoin) {
diff --git a/src/pages/letterPage/pages/letter-select-page.tsx b/src/pages/letterPage/pages/letter-select-page.tsx
index d1e576c..42b6935 100644
--- a/src/pages/letterPage/pages/letter-select-page.tsx
+++ b/src/pages/letterPage/pages/letter-select-page.tsx
@@ -47,7 +47,8 @@ export default function LetterSelectPage({
 
   useEffect(() => {
     const fetchBoardInfo = async () => {
-      if (!shareUri) return;
+      // join 페이지에서는 보드 정보를 가져올 필요 없음
+      if (!shareUri || isJoinPage) return;
       try {
         const response = await getBoardInfo(shareUri);
         setRecipientNickname(response.data.nickname);
@@ -57,7 +58,7 @@ export default function LetterSelectPage({
     };
 
     fetchBoardInfo();
-  }, [shareUri]);
+  }, [shareUri, isJoinPage]);
 
   useEffect(() => {
     // prefer prop `music` if provided
diff --git a/src/pages/letterPage/pages/letter-write-page.tsx b/src/pages/letterPage/pages/letter-write-page.tsx
index a96e2ce..0191119 100644
--- a/src/pages/letterPage/pages/letter-write-page.tsx
+++ b/src/pages/letterPage/pages/letter-write-page.tsx
@@ -97,9 +97,17 @@ export default function LetterWritePage() {
         const stored = localStorage.getItem(LOCALSTORAGE_KEY);
         const draft: Partial<MessageData> = stored ? JSON.parse(stored) : {};
         draft.sender = authorName;
+        draft.content = letterContent;
         // 내게 쓰기 흐름일 때는 자신의 보드 shareUri 사용
-        draft.shareUri = shareUri ?? (isJoinPage ? boardShare?.shareUri : draft.shareUri)
-        draft.shareUri = shareUri ?? draft.shareUri ?? "";
+        draft.shareUri = shareUri ?? (isJoinPage ? boardShare?.shareUri : draft.shareUri) ?? "";
+
+        console.log("메시지 전송 디버그:", {
+          "URL shareUri": shareUri,
+          "isJoinPage": isJoinPage,
+          "boardShare?.shareUri": boardShare?.shareUri,
+          "draft.shareUri (localStorage)": stored ? JSON.parse(stored).shareUri : undefined,
+          "최종 draft.shareUri": draft.shareUri,
+        });
 
         // POST to backend using central message api
         await postMessage(draft);