回执的英文：
Return receipt

参考例句：

Delivery to the addressee personally can only be guaranteed if the acknowledgement of delivery is obtained.
如果得到回执，证明已投送到收件人本人。

Acknowledgment of Delivery
投递回执

Guarantee Card and return receipt
保修卡和回执

It be evidenced by a properly validated return receipt
一份恰当有效的回执即可作为证明

For a service by mail, the date of acceptance marked on the receipt of the mail is the date of service.
邮寄送达的，以回执上注明的收件日期为送达日期。

return是什么意思：
v. 带回，放回，恢复，回到
n. 回来，归还，回报
adj. （票）双程的，往返的；（旅途）返回的，返程的

The return of a prodigal
回头浪子

Return ReceiptsSettings for requesting or returning receipts
返回收据有关收据的请求或返回有关的设置

To return disappointedly; defeated.
铩羽而归

The groom returned to the carriage.
马夫回到马车那儿。

Blair will return to London tonight.
今晚布莱尔将返回伦敦。

receipt是什么意思：
n. 收到；发票，收据；收入
v. 开收据，承认收到

gate receipts | box-office receipts
门票收入

Return ReceiptsSettings for requesting or returning receipts
返回收据有关收据的请求或返回有关的设置

Do you have a receipt for this pearl necklace?
这个珍珠项链您有没有收据？

I am in receipt of a pension.
我定期领取养老金。

Do you still have the receipt?
你还留着发票吗？