These listings appear on the National Archives Aust site NICHOLLS WILLIAM FREDERICK : Service Number - 431735 : Date of birth - 13 Oct 1916 : Place of birth - COBURG VIC : Place of enlistment - MELBOURNE VIC : Next of Kin - NICHOLLS JOYCE dates 1939 - 1948 NICHOLLS WILLIAM FREDERICK : Service Number - VX50701 : Date of birth - 13 Oct 1916 : Place of birth - COBURG VIC : Place of enlistment - ROYAL PARK VIC : Next of Kin - NICHOLLS MARGARET dates 1939 - 1948 NICHOLLS WILLIAM FREDERICK : Service Number - V32139 : Date of birth - 13 Oct 1916 : Place of birth - COBURG VIC : Place of enlistment - Unknown : Next of Kin - NICHOLLS M Nicholls, William Frederick; Army Number - 336085; Date of birth - 13 October 1916 same guy different service no, different next of kin, the last record is digitised for online viewing. The digital record, although hard to read, lists his mother as Margaret, would suggest you at least get a copy of the record which lists his next of kin as Joyce ( it is probably has the most recent details) It may list his address after demob, which post he was returned to, not always same place as embarkation, or if he died in service. May also have copies of any correspodence that was added to his file and this may include details of addresses where medals issued after demob were sent.