Not the brightest bulb in the box

From AC's link, above:

"In 2005 he became the main contact for CFA Trading who found him "helpful and always willing to assist" with their purchase of computer parts and equipment.

The company paid by credit card and in 2006 they became concerned their payments were going through the accounts of forecourt garages rather than into Rock's account.

They noticed Bicknell was driving prestigious cars such as Aston Martins and Porsches but accepted his explanation that the Rock system was down."

Didn't *any* alarm bells start to ring at this?

Paris, because even she would have realised something was wrong, here.

P.S. Where did the thief get his idea from? Superman 3?