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| 内详 | nèi xiáng | name and address of the sender enclosed / details inside |
| 寄件人 | jì jiàn rén | sender |
| 发件人 | fā jiàn rén | (mail or email) sender |
| 回退 | huí tuì | to revert (computing) / to return (a package or letter) to the sender |
| 发报人 | fā bào rén | sender (of a message) |
| 退件 | tuì jiàn | to reject (visa application etc) / (commerce) to return to sender / item returned to sender |