There are a variety of synonyms that can be used to refer to an "attested copy". For example, a "certified copy" is a commonly used term that refers to a document that has been verified as being authentic by a legal authority. Another related synonym is a "notarized copy", which refers to a document that has been signed and sealed by a notary public as being a true and accurate representation of the original. Other possible synonyms include "authenticated copy", "verified copy", and "duly signed copy". Regardless of which synonym is used, the basic idea is to have a copy of a document that has been validated as being authentic and accurate.