Facebook users in the U.S. who want to buy certain ads will now have to provide the last four digits of their Social Security number.
This applies to ads about political campaigns, guns, abortion, immigration and more.
Those who want to buy these kinds of ads will also need to give Facebook a picture of a government-issued ID and provide a U.S. mailing address.
Facebook says it will use all this information to confirm the ad buyer's identity and then delete it.
The company also says approved ads will be identified with a "paid for by" tag.
