i was told that the grip comes with local Canon warranty, but there is NO card issued. if it does breakdown within a year, just go to CSC, show them the grip's serial number and receipt and they will service it for free. Canon has a database for all accessories sold in Singapore so if you bought it from overseas, the serial no. won't be in their database and they won't service it. some of you may say its not true and even i myself can't vouch for it unless i call CSC to verify. but what i do know is that CSC takes their customers seriously and if you bought their accessory from here and if it breaks down becos of product defect within a year, they will most likely repair it for free.
just to quote an incident, i bought my 5D Kit less than a month ago. when i discovered that part of the black paint on the hotshoe had peeled off (small area), i emailed Canon. its not a big issue since its just cosmetic but coming from a brand new camera i was just curious what their response will be. well, they apologised, gave me their CSC address/contact no. and ask me to bring my 5D there and they will REPLACE the hotshoe unit. and i was also assured that it wld take less than 30 minutes. i think that is very commendable becos if you're dealing with other companies they may say that you scratched it yrself or whatever they can wiggle out of. for my case it was clear cut, i didn't drop or bump it, i only had it for a day and don't even have an external flash to mount on the hotshoe to cause it to peel.