diff --git a/internal/repository/letter_outgoing_repository.go b/internal/repository/letter_outgoing_repository.go
index cbe3941..8ace4d1 100644
--- a/internal/repository/letter_outgoing_repository.go
+++ b/internal/repository/letter_outgoing_repository.go
@@ -420,10 +420,23 @@ func (r *LetterOutgoingRecipientRepository) CreateBulk(ctx context.Context, list
 func (r *LetterOutgoingRecipientRepository) CountUnreadByUser(ctx context.Context, userID uuid.UUID) (int, error) {
 	db := DBFromContext(ctx, r.db)
 	var count int64
-	if err := db.WithContext(ctx).
-		Model(&entities.LetterOutgoingRecipient{}).
-		Where("user_id = ? AND read_at IS NULL", userID).
-		Count(&count).Error; err != nil {
+
+	sql := `
+    SELECT COUNT(*) FROM (
+        SELECT * FROM letter_outgoing_recipients
+        WHERE user_id = ? AND read_at IS NULL
+        AND id IN (
+            SELECT id FROM (
+                SELECT id, ROW_NUMBER() OVER (PARTITION BY letter_id ORDER BY created_at DESC) as rn
+                FROM letter_outgoing_recipients
+                WHERE user_id = ?
+            ) ranked
+            WHERE rn = 1
+        )
+    ) result
+    `
+
+	if err := db.WithContext(ctx).Raw(sql, userID, userID).Scan(&count).Error; err != nil {
 		return 0, err
 	}
 	return int(count), nil
diff --git a/internal/repository/letter_repository.go b/internal/repository/letter_repository.go
index d024ab1..f73746e 100644
--- a/internal/repository/letter_repository.go
+++ b/internal/repository/letter_repository.go
@@ -865,10 +865,23 @@ func (r *LetterIncomingRecipientRepository) CountReadByLetter(ctx context.Contex
 func (r *LetterIncomingRecipientRepository) CountUnreadByUser(ctx context.Context, userID uuid.UUID) (int, error) {
 	db := DBFromContext(ctx, r.db)
 	var count int64
-	if err := db.WithContext(ctx).
-		Model(&entities.LetterIncomingRecipient{}).
-		Where("recipient_user_id = ? AND read_at IS NULL", userID).
-		Count(&count).Error; err != nil {
+
+	sql := `
+    SELECT COUNT(*) FROM (
+        SELECT * FROM letter_incoming_recipients
+        WHERE recipient_user_id = ? AND read_at IS NULL
+        AND id IN (
+            SELECT id FROM (
+                SELECT id, ROW_NUMBER() OVER (PARTITION BY letter_id ORDER BY created_at DESC) as rn
+                FROM letter_incoming_recipients
+                WHERE recipient_user_id = ?
+            ) ranked
+            WHERE rn = 1
+        )
+    ) result
+    `
+
+	if err := db.WithContext(ctx).Raw(sql, userID, userID).Scan(&count).Error; err != nil {
 		return 0, err
 	}
 	return int(count), nil