Is an employer required to give you a copy of a performance review or other documentation that you are required to sign and which becomes part of your personnel file?

Question Details:

My employer routinely does reviews (almost monthly) and we are required to sign the review upon completion. While we may agree with what is written, there is often space left where someone could later alter the document. Are they legally required to provide a copy of this to us? Isn't it the law that you are required to receive a copy of any document that you sign? Important Notice