If a Malik-e-Nisab sacrifices on behalf of someone else, instead of sacrificing an animal on behalf of himself (i.e. does not sacrifice an animal on his behalf), then he has committed a great sin. Thus, if he wants to sacrifice on someone else’s behalf, then he should make preparations to buy another animal and sacrifice it.

In villages, it is permissible to sacrifice animals on the 10th of Dhu’l Hijjah after the break of dawn (Subh-e-Sadiq). However, it is Mustahab to sacrifice it after sunrise. [Fatawa-e-‘Alamgiri Vol. 5 Page 260]

It is not permissible to sacrifice animals before the Eid prayer in cities and towns. [Bahar-e-Shari’at]

It is not permissible to give the skin or the meat of the sacrificed animal as the wage to the butcher or the one who has sacrificed the animal. [al-Durr al-Mukhtar]

It is not permissible to give the meat of a sacrificed animal to any infidel.

The method of sacrificing an animal is to lay it on its left, such that its face is towards the Qiblah and then place the right foot on its side and holding a sharp knife (concealed obviously from the animal or if it is blind-folded then there is no harm). The animal should be sacrificed using a sharp knife.

If the Qurban has been performed on behalf of someone who has passed away, then the meat cannot be eaten by the person himself nor can it be given to a rich person. It is wajib to give all the meat to the poor as sadaqah. [Bahar-e-Shari’at]

The animal’s skin, reins, saddle etc should all be given in sadaqah, one can use the skin for their own usage, such as to make the skin into a leather bag or a prayer mat. However, one cannot sell the skin to someone else, and then use the money for their own benefit. If this has been done, then the money received should be given as sadaqah.

Nowadays, people give the animal skin to Madrissahs and other Islamic institutions. This is perfectly permissible. If one sells the skin with the intention of giving the money received to the Madrissa, then this is also permissible. [‘Alamgiri, Bahar-e-Shari’at]

The skin of the sacrificed animal cannot be given to the Imam as his wage. Yes, however, it can be given to him as a gift or for his benefit. [Bahar-e-Shari’at]

A camel must be at least five years old; a buffalo should be at least two years old; and a sheep, lamb or a goat should be at least one year old. [al-Durr al-Mukhtar]

The animal intended to be slaughtered should be big and health, and should be free from any faults or defects. If there is a minor defect in the animal, then the Qurbani will count, but it is Makruh. If there is a major defect, then the Qurbani will not count. [al-Durr al-Mukhtar, Radd al-Muhtar, Fatawa-e-‘Alamgiri] . villages, it is permissible to sacrifice animals on the 10th of Dhu’l Hijjah after the break of dawn (Subh-e-Sadiq). However, it is Mustahab to sacrifice it after sunrise. [Fatawa-e-‘Alamgiri Vol. 5 Page 260]