How is Zakat to be paid on money mixed with the wife's money that has not yet completed its hawl (one year of possession), given the inability to distinguish between the two? Is it permissible to give it to a maternal aunt whose husband and father have passed away, and to her orphaned daughter, or to orphanages? Which is better?

Zakat is obligatory on mixed funds for each partner if their share reaches the nisab (minimum threshold) and a hawl (one lunar year) passes over it. If the two partners are unaware of the amount of their funds, they must estimate and exert effort to determine each one's wealth.

It is not permissible to give zakat to your maternal aunt unless her need is confirmed and she is among those eligible to receive zakat. If this is established, then giving zakat to her is better because she is a relative.

An orphan is not classified as an eligible recipient of zakat by virtue of being an orphan, but if they are poor, then they are among those entitled to it.

Finally, it is not permissible to open an account in a usurious bank except out of urgent necessity, such as the absence of an Islamic bank and fear of losing one's money, provided that the account is a current account that does not accrue interest.