Well, according to the act they sent it. Whether you received it or not they are now free to continue taking actions against you. The fact that many people have started receiving invoices is a clear indication that they have sent out the invoices and that is all they need.
So, a bit of advice, if you want to save some money and not end up with debt collectors bothering you at home and work or later court cases, take the trouble in driving there or looking it up online and pay for your usage.
Despite what all people have said, the public, the DA, Outa, or JPSA, Sanral is playing well within their legal limits and they are doing it right. The only people who will get hurt at the end of the day is those who use the roads and refused to pay.
I can confirm that they will not arrest all non-payers in one day. Arrests and prosecution will be done selectively, but everyone will have their day in court and there will be little chance of getting off....