In the event of a robbery, your first responsibility is to your employees and customers, as you have a duty to maintain a safe workspace and premises.
If you don’t know where to start, consider speaking to local law enforcement about general deterrence measures and the proper way to respond to robberies. They will likely tell you to train your employees to do some of the following:
As you will see in this video, a good employee should give the money as quickly as possible and keep everyone safe.