diff --git a/DevLog/Infra/Service/SocialLogin/AppleAuthenticationService.swift b/DevLog/Infra/Service/SocialLogin/AppleAuthenticationService.swift
index c3df5cda..0c8c1240 100644
--- a/DevLog/Infra/Service/SocialLogin/AppleAuthenticationService.swift
+++ b/DevLog/Infra/Service/SocialLogin/AppleAuthenticationService.swift
@@ -144,21 +144,31 @@ final class AppleAuthenticationService: AuthenticationService {
     }
 
     func unlink(_ uid: String) async throws {
-        let accessToken = try await refreshAppleAccessToken()
+        do {
+            logger.info("Starting Apple access token refresh for unlink. uid: \(uid)")
+            let accessToken = try await refreshAppleAccessToken()
 
-        try await revokeAppleAccessToken(token: accessToken)
+            logger.info("Starting Apple access token revocation for unlink. uid: \(uid)")
+            try await revokeAppleAccessToken(token: accessToken)
 
-        let tokensRef = store.document("users/\(uid)/userData/tokens")
+            let tokensRef = store.document("users/\(uid)/userData/tokens")
 
-        let doc = try await tokensRef.getDocument()
+            logger.info("Starting Apple token document fetch for unlink. uid: \(uid)")
+            let doc = try await tokensRef.getDocument()
 
-        if doc.exists {
-            try await tokensRef.updateData([
-                "appleRefreshToken": FieldValue.delete()
-            ])
-        }
+            if doc.exists {
+                logger.info("Starting Apple refresh token deletion from Firestore for unlink. uid: \(uid)")
+                try await tokensRef.updateData([
+                    "appleRefreshToken": FieldValue.delete()
+                ])
+            }
 
-        _ = try await user?.unlink(fromProvider: providerID.rawValue)
+            logger.info("Starting Firebase Apple provider unlink. uid: \(uid)")
+            _ = try await user?.unlink(fromProvider: providerID.rawValue)
+        } catch {
+            logger.error("Failed to unlink Apple account", error: error)
+            throw error
+        }
     }
 
     // Apple 인증 메서드
diff --git a/DevLog/Infra/Service/SocialLogin/GithubAuthenticationService.swift b/DevLog/Infra/Service/SocialLogin/GithubAuthenticationService.swift
index 340ecbb8..1e5d94c4 100644
--- a/DevLog/Infra/Service/SocialLogin/GithubAuthenticationService.swift
+++ b/DevLog/Infra/Service/SocialLogin/GithubAuthenticationService.swift
@@ -126,18 +126,17 @@ final class GithubAuthenticationService: NSObject, AuthenticationService {
     }
 
     func unlink(_ uid: String) async throws {
-        logger.info("Unlinking GitHub account for user: \(uid)")
-        
         do {
+            logger.info("Starting GitHub access token revocation for unlink. uid: \(uid)")
             try await revokeAccessToken()
 
             let tokensRef = store.document("users/\(uid)/userData/tokens")
 
+            logger.info("Starting GitHub access token deletion from Firestore for unlink. uid: \(uid)")
             try await tokensRef.updateData(["githubAccessToken": FieldValue.delete()])
 
+            logger.info("Starting Firebase GitHub provider unlink. uid: \(uid)")
             _ = try await user?.unlink(fromProvider: providerID.rawValue)
-            
-            logger.info("Successfully unlinked GitHub account")
         } catch {
             logger.error("Failed to unlink GitHub account", error: error)
             throw error
diff --git a/DevLog/Infra/Service/SocialLogin/GoogleAuthenticationService.swift b/DevLog/Infra/Service/SocialLogin/GoogleAuthenticationService.swift
index 31e99b07..9033b35e 100644
--- a/DevLog/Infra/Service/SocialLogin/GoogleAuthenticationService.swift
+++ b/DevLog/Infra/Service/SocialLogin/GoogleAuthenticationService.swift
@@ -119,9 +119,11 @@ final class GoogleAuthenticationService: AuthenticationService {
     }
 
     func unlink(_ uid: String) async throws {
+        logger.info("Starting Google disconnect for unlink. uid: \(uid)")
         GIDSignIn.sharedInstance.signOut()
         try await GIDSignIn.sharedInstance.disconnect()
 
+        logger.info("Starting Firebase Google provider unlink. uid: \(uid)")
         _ = try await user?.unlink(fromProvider: AuthProviderID.google.rawValue)
     }
 
diff --git a/Firebase/functions/src/auth/apple.ts b/Firebase/functions/src/auth/apple.ts
index 1f3a642e..3e9dc953 100644
--- a/Firebase/functions/src/auth/apple.ts
+++ b/Firebase/functions/src/auth/apple.ts
@@ -277,13 +277,19 @@ export const revokeAppleAccessToken = onCall({
 
     try {
         const { token } = request.data;
-        const { teamId, clientId, keyId, privateKey } = getAppleConfiguration();
     
         if (!token) {
             throw new HttpsError("invalid-argument", "Token is required");
         }
 
-            // JWT 생성
+        console.log("Starting Apple token revocation", {
+            uid: request.auth.uid
+        });
+
+        console.log("Starting Apple configuration load for token revocation");
+        const { teamId, clientId, keyId, privateKey } = getAppleConfiguration();
+
+        console.log("Starting Apple client secret creation for token revocation");
         const clientSecret = jwt.sign({}, privateKey, {
             algorithm: "ES256",
             expiresIn: "5m",
@@ -293,14 +299,15 @@ export const revokeAppleAccessToken = onCall({
             keyid: keyId,
         });
 
-        // Apple 서버에 토큰 취소 요청
-        await axios.post("https://appleid.apple.com/auth/revoke",
-                         new URLSearchParams({
-            client_id: clientId,
-            client_secret: clientSecret,
-            token: token,
-            token_type_hint: "access_token" // access_token 또는 refresh_token 지정 가능
-        }).toString(), {
+        console.log("Starting Apple revoke API request");
+        await axios.post(
+            "https://appleid.apple.com/auth/revoke",
+            new URLSearchParams({
+                client_id: clientId,
+                client_secret: clientSecret,
+                token: token,
+                token_type_hint: "access_token" // access_token 또는 refresh_token 지정 가능
+            }).toString(), {
             headers: {"Content-Type": "application/x-www-form-urlencoded"},
         });