How do I know if a sports betting site is safe to play at?

Since the Remote Gambling Act in 2014 was passed only licensed and regulated sports betting sites are allowed to accept money and players. Currently there are two sites that are legal and safe to play on as they are owned and operated by the government of Singapore. In the future there may be more sites added to the list but for now gamblers in Singapore have only 2 options for legal sports betting online.