I find myself in a different generation that requires internal control to keep me surviving. People these days are "smart". Controls are key indicators.

For haulage and other transport businesses you may even need trackers as another eye. It's costly but necessary. 

useful

• There are so many apps these days that makes fraudulent transactions (invoices etc.) so easy and simple internal controls can counter these transactions.
• Segregation of duties (SOD) is very important and in small organizations they don't always have the resources to apply SODs in all their processes but they must identify key processes (e.g. payments) to apply the SOD internal control. Start with selecting the processes that address the 4 reasons listed in this article.