notification mail and parcel number是什么？

背景：阿根廷小白客人，没有进口权，但阿根廷允许个人用从国外东西。由于货物太重，我是通过海运发给他的。下面是他去过海关之后的邮件，请问notification mail and parcel number是什么东西呀？你们觉得客人拿到货的概率高吗？急！谢谢！ hello, i went to the custom on morning and they said me that i must go with the notification mail and parcel number. if i don′t he these papers i cannot get out my chair. i went with the papers that you sent me but that is wrong. i am a simple online shopper so i only need the notification mail. i he nothing to negotiate with oversea. i bought online a product and i can get out myself. you don′t send me the correct papers. do you understand what is the problem? you sent the product like i′m an importer, knowing that i′m not. and now? what′s happen?