diff --git a/internal/db_data/bot_data.go b/internal/db_data/bot_data.go
index 9254170..19a017e 100644
--- a/internal/db_data/bot_data.go
+++ b/internal/db_data/bot_data.go
@@ -64,6 +64,13 @@ func SetUserFirstLastName(userID int64, firstLastName string) error {
 		// return fmt.Errorf("the firstLastName is NULL")
 		return nil
 	}
+	if firstLastName == "NULL" {
+		return AddKeyValueWithExpiration(
+			fmt.Sprintf("%s%d", USER_FirstLastName_prefix, userID),
+			firstLastName,
+			time.Hour*24,
+		)
+	}
 
 	return AddKeyValue(
 		fmt.Sprintf("%s%d", USER_FirstLastName_prefix, userID),
diff --git a/internal/service/bot_service.go b/internal/service/bot_service.go
index a84e62f..3c71b42 100644
--- a/internal/service/bot_service.go
+++ b/internal/service/bot_service.go
@@ -81,7 +81,7 @@ func GetUserFirstLastName(userID int64) string {
 	if len(firstLastName) == 0 {
 		if firstName, lastName, err := api.GetUserFirstLastName(userID); err != nil {
 			// firstLastName = "NULL"
-			log.Errorf("GetUserFirstLastName(%d): %v", userID, err)
+			log.Errorf("api.GetUserFirstLastName(%d): %v", userID, err)
 		} else {
 			firstLastName = firstName + " " + lastName
 		}
@@ -89,6 +89,10 @@ func GetUserFirstLastName(userID int64) string {
 			log.Errorf("SetUserFirstLastName(%d,%s): %v", userID, firstLastName, err)
 		}
 	}
+
+	if firstLastName == "NULL" {
+		return ""
+	}
 	return firstLastName
 }
 
@@ -106,5 +110,8 @@ func GetChatTitle(chatID int64) string {
 			log.Errorf("SetUserFirstLastName(%d,%s): %v", chatID, chatTitle, err)
 		}
 	}
+	if chatTitle == "NULL" {
+		return ""
+	}
 	return chatTitle
 }