I wanted to opt out the hardcopy bill of SP Group because I felt it would be good to save resources (paper, ink, plastic window on the envelope, mail delivery human cost). However, it was not very straightforward for me to find a setting for that on their web service. Below I present a screenshot of the Account Preference page where one can turn on an option to “Opt Out Hard Copy Bills for all my accounts” (or selectively for individual accounts if he/she has multiple accounts with the company).

You can login to the Account Preference page via https://services.spservices.sg/#/login and then clicking “Account” menu in the left side bar.