There is no way to prevent a duplicate voucher from being entered without some custom code. You can set the system up to warn you, but the warning can be clicked through and entered anyway. In the second line, are you asking if there is a way to limit a subaccount's use to a certain company? The answer to that is yes. You would turn on account/sub account validation. But that is a big deal if you aren't used to using it. Planning is key.
↧