Please use the following information not only for your Fetch Rewards account, but also other accounts you used.
Many times, when we hear about companies being hacked, it's not the company themselves being hacked, it's the login information obtained from major data breaches.
Here at Fetch, we like to remind everyone to use a password not used with any other accounts. We've seen situations where bad people are able to use information obtained elsewhere, and enter it in to obtain your rewards. In response, we've added some steps to help you out; however, we can't stop it all if the same login and passwords are used across accounts.
Rest assured, in these situations, Fetch has not been compromised as we take your security very seriously.
A great resource can be found at https://blog.malwarebytes.com/101/2019/01/collection-1-data-breach-what-you-need-to-know/.