Section 46A. No fee for a copy of any record relating to the birth, death, marriage, divorce, adoption or change of name of any veteran, as defined in clause Forty-third of section seven of chapter four, or relating to any person a copy of whose like record is necessary to assist in proving a claim against the United States or the commonwealth by the veteran or by his or her spouse, widow, widower, children, dependents or legal representatives, shall be demanded or received by any officer of the commonwealth, or of any county, city or town thereof, who has charge of such records, from the veteran or from his or her spouse, widow, widower, children, dependents or legal representatives; provided, that such copy is for use in relation to such a claim against the United States or the commonwealth.