With the implementation of Saher system for traffic violation through cameras and doubling of fines, it has become essential for all vehicle owners to register with Ministry of Interior to receive sms on your mobile.
If you have not registered till now and if have a vehicle on your name, I suggest you do so immediately to avoid getting fined for not paying fine. ; ) on the following website. https://eservices.moi.gov.sa/ES/LogInPages/LoginEn.aspx
There have been Arab News reports of people paying more SR 1000 due to the delay in paying the original fine.