There are two ways the proper authentication of copies: simple and notarial. To clarify the question of what way of authentication is required in each case, you should contact that authority or to that person which you are trying to copy.
A simple method of authentication to carry out can be any organization, any Agency, institution, in General, any natural or legal person who issued the original document. Certifies copies of the Manager or, as a rule, a person authorized by him. If these subjects by the time necessary verification not already exist, to certify the copy can only be a notary.
For simple authentication of copies must have:

- the words "Right" under the requisite "signature";

- the position of the person who certified the copy;

- signature of the attesting person;

a signature attesting to the person;

- date of certification;

- seal of the organization, assuring a copy.
Notarial authentication method, but rather the notarial certificate of copies of the document, the process is more complex, besides not free. But such copies will take anywhere, and they do not expire. In order to assure the application, you will need to pay stamp duty or payment of services of private notary, to come to him with the original document and its copy, and also to have the document proving the identity. Without verifying your identity, the notary can assure you nothing will happen.
For some documents, notaries require that they be numbered and stitched. The procedure itself doesn't take very long, unless, of course, your identity will not cause the notary suspicion during the inspection.