Local delivery riders have been able to identify those among them working illegally by their appearance, accents and license plates. SINGAPORE: For some time now, part-time delivery rider Alvin Lim has noticed fellow riders who he suspected were foreigners working illegally in food delivery. Last September, the 33-year-old tried to take matters into his own hands. “At that time, there were so many of them — around five to six riders — just at Serangoon Nex on a daily basis. They were all riding