Originally Posted by Often1

Per the Hertz contract, you are responsible for any fines & penalties imposed on Hertz. Hertz has already been "pad" through its CC merchant account. Now it's a debit to OP's CC account and he is on the hook.

So long as Hertz can document the penalty and that it was imposed during a period of OP's rental, any dispute will be denied.

Basically, OP is in the position of retaining someone in Argentina to research and fight what might be a valid ticket and, if it's not, getting the penalty reimbursed to Hertz so that Hertz will issue a credit to OP.

Bottom line is that unless you are rich and have a lot of time, this is the end of the road (literally).