Question

نمردن از دل درد

Answer 1

Train and equip the cashier properly to protect them from risks and threats ( they are not allowed to register any order so long as they have not recieved the money).

Answer 2

By / Through appropriate / proper training and equipping the cashier secure him against the  possible threats and risks. For example ,  he should not register an order before getting / receiving its money. / amount. / For example, he should be trained not to register an order before he has received its money. / amount.