The assignee of a document request has a limited view into a document request. They can see the document request attachments, and can see and upload directly to requirements that are a part of that document request.
The attachments and requirements will be shown in the portal for them to download. To see the portal yourself, select the Document Requests tab and the Document Request in question:
Then, click View Submission Portal under the title:
The View Submission Portal will open the portal in a new tab, where the assignee can view Attachments and Upload to Requirements:
Note: this link does not require a Buildr login, and can be sent to anyone who should have access to this document request.