diff --git a/src/main/java/com/flab/tess/dto/ErrorResponse.java b/src/main/java/com/flab/tess/dto/ErrorResponse.java
new file mode 100644
index 0000000..882314d
--- /dev/null
+++ b/src/main/java/com/flab/tess/dto/ErrorResponse.java
@@ -0,0 +1,10 @@
+package com.flab.tess.dto;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+
+@Getter
+@AllArgsConstructor
+public class ErrorResponse {
+    private String message;
+}
\ No newline at end of file
diff --git a/src/main/java/com/flab/tess/service/CustomUserDetailService.java b/src/main/java/com/flab/tess/service/CustomUserDetailService.java
index d1e663a..80e9443 100644
--- a/src/main/java/com/flab/tess/service/CustomUserDetailService.java
+++ b/src/main/java/com/flab/tess/service/CustomUserDetailService.java
@@ -6,14 +6,12 @@
 import com.flab.tess.repository.UserRepository;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
-import org.hibernate.Hibernate;
 import org.springframework.cache.annotation.Cacheable;
 import org.springframework.security.core.userdetails.UserDetails;
 import org.springframework.security.core.userdetails.UserDetailsService;
 import org.springframework.security.core.userdetails.UsernameNotFoundException;
 import org.springframework.stereotype.Service;
 
-import javax.transaction.Transactional;
 import java.security.Principal;
 
 @RequiredArgsConstructor
@@ -24,7 +22,6 @@ public class CustomUserDetailService implements UserDetailsService {
     private final UserRepository userRepository;
 
     public User findUser(Principal principal){
-        log.info("cache miss " + principal.getName());
         return userRepository.findByLoginId(principal.getName())
                 .orElseThrow(()-> new UsernameNotFoundException("사용자를 찾을 수 없습니다"));
     }
diff --git a/src/main/java/com/flab/tess/service/TransactionService.java b/src/main/java/com/flab/tess/service/TransactionService.java
index dcacf98..4ef1f64 100644
--- a/src/main/java/com/flab/tess/service/TransactionService.java
+++ b/src/main/java/com/flab/tess/service/TransactionService.java
@@ -2,22 +2,17 @@
 
 import com.flab.tess.domain.Account;
 import com.flab.tess.domain.Transaction;
-import com.flab.tess.domain.User;
 import com.flab.tess.dto.*;
 import com.flab.tess.repository.AccountRepository;
 import com.flab.tess.repository.TransactionRepository;
-import com.flab.tess.repository.UserRepository;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Service;
 
 import javax.transaction.Transactional;
 import java.math.BigDecimal;
 import java.math.BigInteger;
-import java.time.LocalDateTime;
 import java.util.List;
 import java.util.NoSuchElementException;
-import java.util.Set;
-import java.util.stream.Collectors;
 
 @Service
 @RequiredArgsConstructor
@@ -41,6 +36,10 @@ public Transaction saveTransaction(WithdrawalRequestDto withdrawalRequestDto){
         Account sendAccount = accountRepository.findById(sender)
                 .orElseThrow(() -> new IllegalArgumentException("송신 계좌가 존재하지 않습니다."));
 
+        if(receiveAccount.equals(sendAccount)){
+            throw new IllegalArgumentException("송신 계좌와 수신 계좌가 같습니다.");
+        }
+
         //받는 사람, 보내는 사람 계좌 잔액 업데이트
         Account proceedReceiveAccount = receiveAccount.deposit(amount);
         Account proceedSenderAccount = sendAccount.withdraw(amount);
diff --git a/src/main/java/com/flab/tess/util/ControllerExceptionAdvice.java b/src/main/java/com/flab/tess/util/ControllerExceptionAdvice.java
new file mode 100644
index 0000000..b29a2a4
--- /dev/null
+++ b/src/main/java/com/flab/tess/util/ControllerExceptionAdvice.java
@@ -0,0 +1,15 @@
+package com.flab.tess.util;
+
+import com.flab.tess.dto.ErrorResponse;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.bind.annotation.RestControllerAdvice;
+
+@RestControllerAdvice
+public class ControllerExceptionAdvice {
+
+    @ExceptionHandler
+    public ErrorResponse handleException(IllegalArgumentException e){
+        return new ErrorResponse(e.getMessage());
+    }
+
+}