When you applied for the card? IIRC only card applied before Apr2016 need to send SMS for the 5% promo. Card applied from 1 Apr 2016, auto enrolled to the promo.
the mailer confirms no registrations needed:
Your DBS Live Fresh Card now comes with the one of the highest online rebate rates - 5% cashback on all online spend, including online shopping, online travel bookings, online food deliveries, ticket bookings for movies and more. Almost everything you get online gives you cashback so you can Live Fresh!
What’s more, you get 5% cashback on any contactless payments with Visa payWave, locally and abroad. All other payments come with 0.3% cashback.
Sounds good? Simply spend a minimum of S$600 a month to receive up to S$60 cashback.
No registrations required. No tiered rewards or spending criteria to remember.
Want more? Get these festive deals to LIVE FRESH this season: