June 23 -Panapass only on the Corridors

Monday June 22 is the last day to use prepaid cards in Panama’s North and South corridors.
From that date, only drivers who are signed up for the Panapass system may use  the expressways says The National Highway Company (ENA)

The institution said, in a Tuesday May 12 statement,  that card refills will be allowed until May 25 and once the card has expired  the remaining balance will be transferred to the Panapass system, if the user requests
So if you use the corridors, get your Panapass sticker mounted for free. Topping it up costs money.