On the other hand, a non-professional proofreading service, which is provided by someone who is not experienced or trained to proofread documents, has a much greater likelihood of leaving embarrassing language errors in your document. Of course, the advantage is that you probably won’t have to pay your friend to proofread your document. Nevertheless, the extremely low fee that most professional proofreaders charge makes their services very attractive in terms of the return on investment.

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