On August 1, people who had given money to the Democratic presidential ticket began getting ominous messages suggesting their identities may have been stolen. Some received texts from an unknown sender asking them to confirm recent donations. Others told Mother Jones that they received emails warning that their donations had been “flagged” and asking them to click a box to “verify” that they had really contributed the money—or to click “no” if they did not recall doing so. One donor described the email he received as “mysterious, vague, and somewhat threatening.” That email, similar to the one pictured below, requested that he respond within “the next 24 hours.” The recipients of these messages have something in common: they’re listed in federal campaign filings as having donated to Joe Biden or Kamala Harris using ActBlue, a ubiquitous online platform that makes it simple to contribute to a vast array of Democratic candidates and liberal causes.