I need to send this certified mail.

我要寄保证邮件。

I need to send this by certified mail.

我需要以保证邮件的方式投寄.

Send certified mail return receipt requested.

以挂号信方式寄出，收条交回。

Creditor's credit office by certified mail.

债权人通过挂号信的信用办公室。

Send certified mail, return receipt requested.

以挂号信方式寄出, 收条交回.

You can use certified mail with a return receipt.

你可以用带回条的挂号信.

US Express Mail, US Certified Mail ( with full label ) are recommended.

美国快递邮件, 美国签收邮件 ( 全部标签 ) 都是上佳选择.

You have to sign for it when you receive a certified mail.

您收到挂号信的时候要签收.

Either way, you should write a letter, sent certified mail, demanding validation/proof of the debt.

无论是哪条路子，你都地写封信，发送确认邮件，索要债务验证/证明。

Send off your correspondence by certified mail, return receipt requested so you can document when the credit reporting agency received your letter.

欢送你的认证邮件函授、所以你可以请回文件时收到的信用报告机构收到你的来信。