Google have just updated their local reviews guidelines for markup, Mike Blumenthal announced on its Twitter 3 days ago.
What are the reviews markups?
They look like these and they can be placed with schema.org:
What is the exact change?
Well from now on Google disallows marking up 3rd party reviews from other websites.
So in essence, you will have to include only reviews from your website, that were produced by products bought directly from your site you are also obligated to have both negative and positive reviews. They also need to be real, unique and no duplicates.
Anyone here using review markups? If yes, makes sure you read all the new changes so you are in the clear.