He asked his mother to send it by registered mail.

他让他妈妈用挂号邮件寄。

《柯林斯英汉双解大词典》

Please send this by registered mail.

请用挂号邮件寄这个东西。

youdao

I'd like to send it as registered mail!

我要寄挂号！

youdao

Section 6532(a)(1) indicates that the mailing of the Notice of Claim Disallowance by certified or registered mail triggers the beginning of the two-year limitations period in which the taxpayer can bring a suit for refund.

FORBES: When It Comes to the Two Year Statute - You are on Your Own

And apart from being able to lock printers to accept e-mails only from registered e-mail addresses, there is little control for IT managers.

FORBES: The Good, Bad And Ugly Of Different Mobile Printing Solutions

Thousands of people registered their support in an Oxford Mail campaign to keep him broadcasting in Oxfordshire, so he is delighted to join BBC Oxford.

BBC: Oxford - Presenter Profile: Wesley Smith