import telebot from telebot import types,util bot = telebot.TeleBot("token") #chat_member_handler. When status changes, telegram gives update. check status from old_chat_member and new_chat_member. @bot.chat_member_handler() def chat_m(message: types.ChatMemberUpdated): old = message.old_chat_member new = message.new_chat_member if new.status == "member": bot.send_message(message.chat.id,"Hello {name}!".format(name=new.user.first_name)) # Welcome message #if bot is added to group, this handler will work @bot.my_chat_member_handler() def my_chat_m(message: types.ChatMemberUpdated): old = message.old_chat_member new = message.new_chat_member if new.status == "member": bot.send_message(message.chat.id,"Somebody added me to group") # Welcome message, if bot was added to group bot.leave_chat(message.chat.id) #content_Type_service is: #'new_chat_members', 'left_chat_member', 'new_chat_title', 'new_chat_photo', 'delete_chat_photo', 'group_chat_created', #'supergroup_chat_created', 'channel_chat_created', 'migrate_to_chat_id', 'migrate_from_chat_id', 'pinned_message', #'proximity_alert_triggered', 'voice_chat_scheduled', 'voice_chat_started', 'voice_chat_ended', #'voice_chat_participants_invited', 'message_auto_delete_timer_changed' # this handler deletes service messages @bot.message_handler(content_types=util.content_type_service) def delall(message: types.Message): bot.delete_message(message.chat.id,message.message_id) bot.polling(allowed_updates=util.update_types)