In Singapore, Muslims are highly encouraged to make a will if they want to distribute a maximum of 1/3 of their assets to non-Faraid beneficiaries, according to the MUIS.
Non-Faraid beneficiaries include non-Muslim family members, adopted children, illegitimate children, charity, and friends.
You can also appoint someone of your choice to be an executor. The process to get a Grant of Probate is generally faster, cheaper, and easier than getting a Grant of Letters of Administration.
Read more: How Does Muslim Inheritance Work in Singapore, All About Probate & Administration (Singapore Edition)