Is Zakat obligatory on the wealth of a deceased father, which was discovered five years after his death and was a deposit held by another person?

The calculation of zakat on inherited money begins on the day of the inheritor's death, as ownership transfers to the heirs. However, one of the conditions for zakat to be obligatory is complete ownership, meaning the money is in the owner's possession, and they can dispose of it as they wish. Therefore, if the heir did not know about the existence of the money until years later, there is no zakat due on them for the past years.