From time to time over the years I have been contacted by organizations and businesses who have had one employee with complete ownership of the POS system. While this may seem like a good idea from a security and procedure standpoint, when that employee moves on, these organizations and businesses realize that no one else knows how to run the POS system and now they have to spend some money on training.
I've also found that this encourages bad habits as the sole employee in charge of the POS system may not be using the POS system correctly when it comes to inventory control, security, etc.
Point being that when you invest in a POS system, make sure that cross training takes place so more then one employee knows the entire POS system and then these employees can also cross check each other to ensure that proper procedures and security measures are in place.
Are you in the US and in need of no cost retail point of sale advice? I'm happy to help and can be reached on my cell at 208-340-5632 (I am on Mountain Time) or via email at email@example.com. There is also a contact form to the right that can be used to reach me.