When Robert McNamara took over Ford, accounting was so messed up, they would weigh their invoices and if the amount wasn't too far off from the expected dollars/pound ratio, they would pay it.
From _Go Like Hell_ by A.J. Baime (2010):
> Ford Motor Company was hemorrhaging millions of dollars every month. It was impossible to give an exact number because there was no accounting system. “Can you believe it?” Henry II later remembered. “In one department they figured their costs by weighing the pile of invoices on a scale”
I had no idea that piece of shit was associated with Ford at all.
Even Google evnetually caught a few people who just cold sent in invoices and found that Google would pay.