A certified copy is a copy (often a photocopy) of a primary document, that has on it an endorsement or certificate that it is a true copy of the primary document.It does not certify that the primary document is genuine, only that it is a true copy of the primary document.A certified copy is often used in English-speaking common law countries as a convenient way of providing a copy of documents.It is usually inexpensive to obtain. A certified copy may be required for official government or court purposes and for commercial purposes.t does not certify that the primary document is genuine, only that it is a true copy of the primary document. A certified copy is often used in English-speaking common law countries as a convenient way of providing a copy of documents. It is usually inexpensive to obtain.