Conditions of paying debt from Zakah

My brother took a loan from my husband and has not paid it yet although two years have passed since then. If I pay this sum to my husband as if it were from my brother, can I regard it as part of the Zakaah due on my property?

All perfect praise be to Allaah, the Lord of the worlds. I testify that there is none worthy of worship except Allaah and that Muhammad , is His slave and Messenger.

It is permissible for you to give the Zakah of your property to your needy brother. But it is insufficient to pay the debt on his behalf from your Zakah, except with his permission, for Zakah should be given to the poor to own, and he then has the choice: to pay his debt if he wishes, or benefit from it in whichever way may be more important, in his sight, than to pay the debt.

Allaah Knows best.