The FTC warns that scammers are using stimulus payments to try and rip people off.[2]
If you receive text messages, robocalls, emails, or social media messages that ask you to reply regarding your stimulus check, it’s a scam. Do not respond.
The FTC advises that you should only use the IRS website to submit payment information: https://www.irs.gov/coronavirus/economic-impact-payments
They also ask that you report any scam messages that you receive through their website: https://www.ftccomplaintassistant.gov/