You know the drill. They ring the doorbell, say the line, and get their candy. But this Halloween, some trick-or-treaters may have given you a piece of chocolate back, with a card that has a bracing message about child labour in cocoa fields.

Reverse trick-or-treating has made its way to Canada from the U.S., though it’s still a “relatively small event in Toronto,” said Michael Zelman, director of communications at TransFair Canada, to the Toronto Star. A thousand chocolates were distributed in Toronto on Saturday.

San Francisco resident Adrienne Fitch-Frankel launched the campaign. She wanted to promote fair trade chocolates, which ensure fair wages and environmental stability.

According to Fitch-Frankel, “We are starting a new Halloween tradition.”