An Alaska family said they found a disturbing, anti-Santa note that warned their children Kris Kringle was not real inside the box of a toy purchased at a local Walmart.

“Hey friends ❤️ just a heads up to consider double checking your kids’ Christmas gifts (especially if they believe in Santa),” Brianna Ridge posted on Facebook last week, along with photos of the missive.

The front of the decidedly not-festive flier read: “HEY KIDS!! Santa is fake but Jesus is real.”

The back included a typed note letting kids know that “there are no flying reindeer or elves making toys in the North Pole” and that “Christmas is actually about a real man, Jesus.”

It urged parents to “stop lying to your children about Santa” and tell them “the truth” about Jesus, instead.

Ridge said her mom found the unsigned message last week when it slipped out of the packaging of a doll meant for Ridge’s 2-year-old daughter.

“She wouldn’t have noticed it at all except that she thought it was an instruction packet falling out of the box and went to tuck it back in,” she wrote, adding: “This would have been very upsetting for my kiddo to find.”

Ridge’s mother called the Walmart in Wasilla to let them know about the message, she said.