After a night out, many ungrateful young adults forget to let their moms know they got home safely. Ironically, while calls go unanswered, food orders don’t—especially late at night. They come back from a night out, don’t call their moms to say they’re okay, yet still have their phones in hand to order food.

iFood, the biggest food delivery app in Latin America, decided to step in and offered 50% off late-night food orders—but with a catch. To redeem the discount, users had to call their moms and ask for the promotional code. So, are you hungry and craving a big discount on your food order? Then go call your mother.