Question: My mother, who lives oversees wants me to do the qurbani here on her behalf. But she will not pay for it until about a month later. Is it ok for me to do it out of my money and get paid back later from her.Jazakallah Khair.

Answer:

Walaikum salam wrt wb honorable sister:

All praise is due to Allah.

There is nothing wrong with the situation you mentioned. Your doing
qurbani on her behalf will suffice, and it does not matter if she pays
for the qurbaani now or later, or if you forgoe the payment
altogether.

It is permissable to appoint an agent to carry out the udhiya on one’s behalf.

It should be noted that one qurbaani suffices for the entire
household, no matter how many people are living together even if this
includes extended family, grandparents, etc.

It should also be noted that the strongest view amongst the ulema is
that the udhiya (qurbaani) is a sunnah ma’akada.

Allah knows best.