@Holland , @ChrisE_AGL Both your Account Number and NMI are always listed on your bill.On the top right hand side of your bill Page 1 under Details (after July 2023)Prior to that it was on Page 2 of your bill under Your electricity supply details on the top right hand sideFailing that go to your meter box and read the number(s) off your meter(s). I don't know why the AGL staff don't want anyone to know that, it's not a secret....