Is zakat obligatory on a sum of money designated to pay a fine ruled against a person, when this sum is deposited in a safe place until the end of his prison term?

Zakat (definition) is obligatory on seized money if it reaches the nisab (definition), whether seized by the person himself or by his agent. Scholars differed on deducting debt from zakat. The more cautious view is not to deduct it, and this is the madhhab (definition) of Al-Shafi'i and the choice of Ibn Baz and Ibn Uthaymeen, whereas the madhhab of the majority is to deduct debt. However, if the money has not been seized, no zakat is due on it. Zakat becomes obligatory on those who disbursed the money if the share of each one of them reaches the nisab, either individually or by combining it with his other assets.