Working papers have been written to explain how a bank or company is audited, but the reality is often quite different.

This is because audit is so different from a bank, and there is a lot of work done by auditors.

To help make this clearer, this is our list of the best and most useful audit tools.

If you need a more in-depth guide to auditing, we recommend The Audit Guide from

This article is part of the BBC Future series on managing your financial life.