A certified translation is translation of the original text ensuring the identity with the original (certified by a court interpreter) containing  the seal and the signature of a court interpreter. The validity of a certified translation is unlimited, unless otherwise stated by law. All documents written in a foreign language in the original  have to be translated into the official language of the competent state by a court interpreter for a certain foreign language, in order to have power of evidence in the legal system of a state. Only certified translation of a certain public or private document has power of evidence of a public document. A certified translation is required when exercising  rights in proceedings before all state administration bodies,  notary public and the courts.