The US Department of Homeland Security has issued a Scam Alert stating employers have been receiving scam emails requesting information from employee I-9 forms.
USCIS website states: “These scam emails come from a fraudulent email address: email@example.com. This is not a USCIS email address. The body of the email may contain USCIS and Office of the Inspector General labels, your address and a fraudulent download button that links to a non-government web address (uscis-online.org). Do not respond to these emails or click the links in them.”
For more I-9 information on this and other events, see the following webpage https://www.uscis.gov/i-9-central/whats-new