The external tariffs validation now works also on Box office (all types of Box office including Mail, Call Center, Quick sale, Goods)
From the Tariff setup screen, you can check on the new parameter to activate it
(*note: the validation on Ticketshop always works regardless of this parameter)
Tariffs validation on Box office is applied for single entry (Event, Competition) and Season tickets.
The validation is activated upon choosing a Payment method: