The government claimed that Australian citizen and States Times Review blog owner Alex Tan had made "false" and "scurrilous" claims surrounding election rigging and the arrest of a purported whistleblower. Tan had initially refused the order and is now under investigation, although there may not be much Singapore can do when Tan doesn't live in the city-state.

In a statement to Reuters, Facebook didn't outright object to the law but did worry about the potential to abuse this law. "We hope the Singapore government's assurances that it will not impact free expression will lead to a measured and transparent approach to implementation," a spokesman said.

The law has drawn concerns over not just its political implications, but its scope. It applies even to posts made from outside Singapore, and a refusal to comply could lead to as much as a 10-year prison sentence or a S$1 million (about $731,100 US) fine.

Facebook is no stranger to blocking content that violates local laws, but this is the first time it's been ordered to post a correction under such a law. As such, many are watching closely. Will this discourage fake news peddlers, or will it be misused to tarnish critics of the government? The definition of what's false isn't always clear, and laws like this could be easily misused if there's room for different interpretations.