registered mail
registered post

Having tickets sent by registered mail is an extra $7.

You can't send registered mail to a post office box.

Three more boxes of these showed up this morning via registered mail.

Consider sending your form by registered mail if it contains sensitive and/or personal information.

Instead of standing in long lines, he sent his absentee ballot by registered mail.

I get a really limited selection of registered mail, and it's never good news.

Washington also sent a letter by registered mail to their place of business in Missouri.

A sack of registered mail from Brazil struck his fancy.

There is no limit on the value of an item sent in by registered mail.

When receiving registered mail for an expected guest, what procedure would you follow?