There is NO fee if you pay electronically through your bank account. I LOVE how this works in Costa Rica - especially like with CitiBank which has the EASIEST website in English!!! All you need is the account number (which could be for someone else even!) - just put the type of payment and number and they'll tell you how much is due and you can even pay someone else's bill! (hey - this is a GREAT "Pay it Forward" move to just do something nice for someone without them knowing about it!!)
"HOW • WHERE TO PAY YOUR UTILITY BILLS IN COSTA RICA."