The process of paying a ticket or a penalty charge notice depends on what kind it is and who emitted it. You approximatively have 28 days to pay, and in some cases the penalty is reduced by 50% if you pay within 14 days. It is important to keep the ticket, because you have on it all the information about how to pay. If you lose it, try to contact the ticket issuer to find all you need to know about the payment.
You could get a penalty charge notice (PCN) for parking too and the reasons are many. Try to not break some traffic rules, or you can get a PCN for going against a ‘no right turn’ sign or driving in a bus line, for example.
If you don’t pay a penalty charge notice within 28 days, you will surely get a ‘charge certificate’ and you will have 14 days to pay the original fine plus 50% more.
It is important to park wisely. Obviously, the fines variate from city to city and country to country. A study released in San Francisco shows that there are the most expensive parking fines, and you will be obligated to pay it if you don’t respect the parking requirements.