Apparently no, not so fast. Yes I did saw that little halal logo on their banner but upon further inspection on their official website, I still see that questionable Nissin sausage egg noodle on sale at their restaurant. Now last time I check, Nissin instant noodle is labelled as non-halal at all hypermarket that I visited. Maybe there are more than one Nissin noodles sold out there in the market perhaps? I doubt it. A simple Google search will show you that those type of noodles are usually served at non-halal restaurants and food outlets.
Besides, if Oldtown White Coffee did get a halal certification they should have put them halal logo prominently and make them highly visible at all their stores and also their advertisements. At their website the only glimpse of halal certification is this one line that said "we also carry the HACCP and HALAL certification, making White Coffee a beverage that can be enjoyed by all". I see halal beverage but not halal food.So would I rush to any Oldtown White Coffee outlet anytime soon? Unfortunately the answer is still a resounding no.
Update
Looks like Oldtown White Coffee is certified halal after all. At least some of them which displays the halal certification from the Islamic Food Research Centre Asia (IFRCA). IFRCA is like JAKIM certification but they cover other Asian countries as well. You can check out the list of Oldtown White Coffee outlets (and other restaurants as well) who have obtained their halal certification from IFRCA here.
If you're still in doubt, make sure you look for this logo and certification whenever you enter one of their outlets. I hope this will put this Oldtown White Coffee confusion to rest.