Clarification on this text in your website....

[veegee123]

Hello,
In this link
https://www.immihelp.com/usa-visas/vi...rdocs.html
You have mentioned "in duplicate" as follows.....
Statement from your employer, in duplicate, on business stationary, showing ....

what is the meaning of it. Do I need to take two copies of this letter from my employer.
Please clarify.
I appreciate your quick response.
Thanks,
Veegee

[immihelp]

One for each person that you are sponsoring.