Consumer Law ; Robertson v. Mercantile Credits Pty. Ltd. and Proland International Pty.Ltd. [1987] A.S.C. 55-603 ; Saunders and Camilleri v. Permanent Pantry (trading as Valley Pride) andCustom Credit Corporation Ltd. [1988] A.S.C. 55-678 ; McCormick v. Formplex Australia Pty. Ltd. (unreported, 21 July 1988, Gray J.) ; John Stanley Arnol v. RBP Pty. Ltd. (unreported, 23 May 1991, O'Bryan J.) ; Custom Credit Corporation v. Lupi [1991] A.S.C. 56-024 ;