My husband sent zakaah money to his sister in Pakistan, to distribute it to the poor, but recently there have been family problems between them, and it does not seem that these problems will be resolved in the near future. Now she is threatening to spend the zakaah money on herself, and says that she will never give it back to us. What is the ruling on the zakaah money that my husband gave but it did not reach the rightful recipients because of his sister, who has possession of this money? What should we do in this case? How should we work out our zakaah now, when the money we sent to her was more than the zakaah that was due, because we were hoping that the additional money would be used to pay zakaah of the coming year?

Praise
be to Allah

Firstly:

It is obligatory
to take care of ties of kinship, and not to sever them when family disputes
arise, because severing ties of kinship is a major sin.

Secondly:

If a man has
prepared the zakaah of his wealth, then it is stolen or destroyed, he must
give it again, because the zakaah did not reach those who are entitled to
it. See the answer to question no. 159996.

Thirdly:

If the owner of
the wealth delegates someone else to give his zakaah, the person whom he
appoints is his deputy and is acting on behalf of the owner of the wealth.

If the zakaah is
stolen from him or is destroyed, the owner of the wealth must give it again,
because his deputy was acting in his stead, so it is as if it was stolen
from him or was destroyed when it was in his possession.

An-Nawawi (may
Allah have mercy on him) said:

Chapter on
giving zakaah:

Zakaah is
obligatory with immediate effect, once one is able to give it (after his
wealth reaches the nisaab and one full year has passed), then to pay it, he
has to form the intention and take action. As for taking action it, this may
be done in three ways:

i.       

The owner distributes it himself, which is permissible

ii.     

He delegates that to the ruler (the authorities), which is
permissible

iii.   

He appoints someone else to deliver it to the ruler (the
authorities) or to distribute it among the categories of people for whom it
is permissible for him to distribute it himself.

As for which of
these ways is better, distributing it himself is better than appointing
someone else to do it, with no difference of opinion among the scholars
concerning that, because the person appointed to do it may betray that
trust, in which case the obligation is not waived from the one who appointed
him.

End quote from
Rawdat at-Taabieen (2/204-205)

Al-Bahooti said
in Kashshaaf al-Qinaa‘ (2/268):

If the zakaah is
destroyed when it is in the possession of the person appointed by the owner
of the wealth before he has delivered it, then the owner of the wealth is
still liable for it, because he has not fulfilled what he was enjoined to do
(of ensuring that it reaches the poor), and because the hand of the deputy
is like the hand of the one who appointed him to do that task.

See also the
answer to question no. 36512.

Based on that,
if your husband appointed his sister to give the zakaah and she did not do
it, and did not deliver it to the people who were entitled to it, then he
must give it again.

What he must do
now is give the zakaah of his wealth for one year only, which is the year
that has already passed. As for the wealth that he wanted to give for the
coming year, he does not have to give anything else instead of it at
present; rather he should wait, then when the year has passed, he should see
what he has to give of zakaah on his wealth, and then give it.

We ask Allah to
set things straight among you, and to reconcile between the brother and his
sister, and to restore to people what is due to them.

And Allah knows
best.