Make a charitable donation in their name, and put it in a card. This is actually genuine as you spent actual money, but it’s also kind of an anti-gift. Sometimes the donation even gives you a free gift like a calendar or T shirt which you can pass along. Some people may be triggered by specific charities like The Satanic Temple, or Planned Parenthood. I would be quite upset if somebody gifted me a PeTa donation. But in that unlikely event, I would laugh and gift them back a Heifer International donation.