if adult children live together with their parents. and children buy food or contribute to food purchases. is it sufficient for a parent to sell chometz. or does each child have to sell chometz also?
When the adult children chip in they are essentially giving it to the “house” which is owned by the father. Therefore, he is the only one who has to sell the chometz, and his selling of the chometz is sufficient for all the food in the house.
Horav Y. Cahen shlit”a