Please deliver the document certified.

请寄来经证明的文件。

youdao

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。

youdao

A requirement for a document to be legalized, visaed, certified or similar will be satisfied by any signature, mark, stamp or label on the document which appears to satisfy that requirement.

诸如单据须履行法定手续、签证、证明等类似要求，可由单据上任何看拟满足该要求的签字、标记、戳或标签来满足。

youdao

The smarter people then take this document to a Certified Public Accountant for review, revision and signature.

FORBES: Why An Educated Client Is A Good Client

In the present case, Allen County sent both of the tax sale notices at issue by certified mail, return receipt requested, to the address listed in the mortgage document and to another local address.

FORBES: Wells Fargo Ignores Mail Loses Security Interests