I don't get the whole business of charging R750 for a fine... then giving you half off if you pay within a certain time period? This is not a bargain shop. A fine is a fine... since when do you get discount for paying a penalty? Just more proof that this is one massive money making exercise by the Metro.
Yeah, but anyway...
1) Do you have any photographs? Always get the photograph first. Very often they have lost the photo... or it is not even your car. Also check all the other details on the fine... date, place, etc. If the details are wrong, then you need to highlight that.
2) Address a letter to the Public Prosecutor at the Magistrate's Court in the Jurisdiction where the fine was obtained, deliver it by hand if you can otherwise regular mail. You need to speak to the Public Prosecutor in the area where the fines were given. in other words, if you got the fine in Nelspruit, you need to go and speak to the Public Prosecutor at the office of the court in that area. Usually you can also just write a letter. And yes, people do usually have good success in reasoning with the guy. His job is to weed out cases that would not have much success in court. send a copy of the fine with the letter.
3) Make the subject line of your letter "Request for Mitigation of Sentencing upon admission of guilt" and then state your reasons that you are a student or housewife or whatever other sob story. They should reduce it by at least 50%. Good Luck. You are basically telling them that you admit guilt, but you cannot pay the amount of the fine. They will be glad that you are admitting guilt and will cut the fine down to a more reasonable amount. The Public Prosecutor has that discretion. If you can draft the letter AND take it with you to see the public prosecutor at the court where the fine is directed. Just ask for the office of the public prosecutor.