Deactivated user, what we did to get something like this is to create an "Ungraded Assignment" and in the body of the "Instructions" you can put the content of the document (or link to the document) with instructions that the student has to type his or her name as a digital signature.
This assignment is set up in a module as a pre-requisite before the student can move on to anything else. Of course, this is at a course-level. You could set up an orientation or "document signing" course that students have to "take" before they can take any other courses.

I don't know if that would meet your purposes or not, but I hope that helps.
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