The phrase "as a separate document" is correct and usable in written English.
It can be used when referring to a document that is distinct from another document or part of a larger set of documents.
Example: "Please submit your report as a separate document to ensure clarity and organization."
Alternatives: "in a distinct file" or "as an individual document".
The Assurance Form regarding NASA restrictions on funding activities with China is no longer required as a separate document.
Have a look at the Cuomo letter and the reply here (posted as a separate document because of its length) and judge the merits of her argument.
Carl Pope, the outgoing president of the Sierra Club, sent a long reaction that I've posted as a separate document via crocodoc.com.
Nov. 20 – Carl Pope, the outgoing president of the Sierra Club, sent a long reaction to the post and discussion that I've posted as a separate document via crocodoc.com.
The purpose of publishing the algorithm as a separate document is to provide guidance for clinicians while maintaining a clear distinction between what is evidence based and what is consensus based.
The discovery, among the fragments found in the first Qumrân cave, of two columns that were thought at first to be the missing beginning of the Manual of Discipline but were recognized later as a separate document increases the plausibility of this theory that the ritual of the Last Supper ultimately derives from the sect.
Instead it shows up as a data transfer with the physical note being kept at a separate document repository company.
has gone so far as to leak a separate document from the talks on his website.
As a result, Mr. Miller said, some co-op lawyers had started requiring all incoming shareholders to acknowledge the co-op's lien in a separate document known as a security agreement.
Often, the creator of a trust outlines his or her philosophy in a separate document, to avoid having it construed as legally binding.
