diff --git a/src/telegram/player-commands.js b/src/telegram/player-commands.js
index d2fb215..f0fb93c 100644
--- a/src/telegram/player-commands.js
+++ b/src/telegram/player-commands.js
@@ -78,10 +78,14 @@ const userCreateInvitation = () => {
         }
 
         if(ctx.message.chat.id === -1001780498838) {
+            if(await Player.findOne({ 'email': args[0] })) {
+                return await ctx.reply('该邮箱已被注册')
+            }
+
             const [i, v] = makeInvitation(ctx.message.from.username, args[0], 'telegram')
             ctx.replyWithMarkdownV2('邀请码：\n```' + i + '```\n\n验证码将发送到私聊，如果您未私聊启动过bot则无法接收到消息，请 /start 后再次执行此指令。')
             try {
-                await telegraf.telegram.sendMessage(ctx.message.from.id, '验证码：\n```' + v + "```", { parse_mode: 'Markdown' })
+                await telegraf.telegram.sendMessage(ctx.message.from.id, '验证码(请不要发给任何人)：\n```' + v + "```", { parse_mode: 'Markdown' })
             } catch (_) { }
         } else {
             ctx.reply('您不符合自我邀请最低要求，无法获取邀请码')