Praise be to
Allaah.
Our
shaykh ‘Abd al-‘Azeez ibn Baaz (may Allaah have mercy on him) was asked
about the payment of a lump sum upon redundancy for an employee of a
interest-based bank. He replied that it is permissible for him to take
something in return for the period that he worked in the riba-based
bank before he knew that it was haraam, and that it is not permissible
for him to take anything for the period when he worked and was aware
of the prohibition.
For
example, if we suppose that he worked for 30 years in the bank, and
he did not know for 20 years that his work was haraam, then he came
to know of the ruling, but he continued to work for another 10 years,
then he may take (a lump sum) in return for the twenty years, but not
for the last ten years.
With
regard to his children, it is permissible for them to take what they
need from their father even if his earnings are haraam, because his
spending on them is obligatory, and the sin is on him only. But they
should advise him and not take too much. And Allaah knows best.