I don't know about other brands (most probably the same applies) but Canon Australia will not honor warranty unless the equipment was purchased from a Canon Australia authorised dealer. That is a fact and they will ask you for a receipt as well as the warranty card.
So, if you buy Canon gear in Singapore or anywhere on-line and you have a problem with it, you have to go to the supplier. Some of them have their own technical services, others don't. I would be very reluctant to send expensive gear to some shop in Singapore for repair.
So, if you buy Canon gear in Singapore or anywhere on-line and you have a problem with it, you have to go to the supplier. Some of them have their own technical services, others don't. I would be very reluctant to send expensive gear to some shop in Singapore for repair.