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The Islamic Will
Malik related to me from Nafi‘ from ‘Abdullah ibn ‘Umar that the Messenger of Allah, may
Allah bless him and grant him peace, said: “It is the duty of a Muslim who has anything to
bequeath not to let two nights pass without writing a Will about it.” (Al-Muwatta’ of Imam
Malik: 37.1.1)
Make a list of everything that you own. What you own is known as your ‘estate‘ and includes your home and its contents, your
car and your savings, investments, interests, minus  debts, such as unpaid dowry (mahr) and Zakah.

You should specify in your Will that you would like your funeral and burial rites to be carried out in accordance with the
practices of Islam. These include:

      It’s a quick and simple process to make a Will and it’s relatively inexpensive too!not having your dead body subjected to a
routine post mortem examination because the Prophet Muhammad, may Allah bless him and grant him peace, said, "Breaking a
dead man’s bone is like breaking it when he is alive." (Sunan of Imam Abu Dawud)

      having your body released for burial immediately after death;

      having a Muslim burial;

      advising where and how your body is to be buried;

      if you do not wish for any of your organs to be used for medical research or organ replacement operations, then say so.

It is best to have an attorney, paralegal or someone trained in writing wills, bit in absence of that
  • you must be at least 21 years old, possibly, 18 in some jurisdictions.;

      You must be of sound mind;

      Your Will must be in writing;

      You must identify yourself as the author of the Will;

      You should state that it is your last Will – and that any previous Wills and Codicils are revoked;

      The Will must be dated and signed by you in the presence of and attested by two witnesses who are neither a spouse nor a
beneficiary under the Will.

http://www.muslimcongress.org/contentmc/services/islamic-will.aspx