Can I list properties for someone on social media?

I was offered a job listing properties on Facebook Marketplace as well as on a site called Anvil. I was wondering if that's a thing that needs a license to do. I don't know the person (we connected through an online job search site), and I don't have any property info yet. I guess it just seems too good to be true. I am in New York state, but I believe some of the properties are in other states as well. Can I do this and not get in any trouble? Thank you so much for your time!