This question already has an answer here:
I was in the middle of doing my homework for a class (its a worksheet for a word document) and I noticed that the author of the word document is not my professor.
I looked it up, and it turns out that the person who wrote the document teaches a related class at a different university.
I checked the rest of the document, and nowhere (other than the word metadata) says that it comes from this other person.
Should I do anything with this information, and if so, what?