Anna,
I have not seen a document like this before. It looks like the clerk responsible for filing this decided on his own, or was told, to put the entire page into the file of Alexander Ervin because, as you pointed out, his is the first name on the list. It is a shame that this information was apparently not indexed and recorded on cards to be inserted into the individual soldiers' records. Other pages may have similarly been put in other soldier's records without indexing. if that is so, without long, arduous, and diligent research, these records may never become easily available. From what I can tell, this form was copied, almost as-is, from a similar US form. The only other example that I could find in Fold3 is found in the records of the 54th Massachusetts Infantry (the same unit featured in the movie "Glory"). This leads me to suppose that it might be found in the records of most Union regiments, but may not be so common in Confederate records. If you want to see the Union version in Fold3, under "Category" go to "Civil War" then under"Publication" you will find the records of the 54th - apparently the only regiment from either side to have its complete record there. It is listed as "Civil War - MA 54th Infantry Regiment Records." There, under "Unbound Records" you will find "Quarterly Returns of Deceased Soldiers". These are merely my thoughts on the matter. A visit to the archives in DC might be the only way to be sure.