What's the longest period for a traffic offence summon to arrive and is it true that the summon will be nulled and void if it arrives later than 2 weeks?

Hi Patrick! Yes, it will take an average of 2 weeks to reach you, alternatively, if you haven't receive any summon, you can enquire and check about any outstanding fines through here: https://vrl.lta.gov.sg/lta/vrl/action/pubfunc?ID=EnquireOffence.