Answer:
(Fatwa: 1273/973=H/1429)
(1) That lady teacher committed an unlawful act, she herself stole your mobile and she, despite of demanding the mobile, did not return it which is usurpation and it is more sinful than theft. Moreover, it is more severe sin to ask for a fine or demand a feast party.
(2) It is not obligatory for you to give party; her demand for a party is unlawful.
(3) It is allowable to give a party in compulsion if it is difficult to take back the mobile without it, but since you have no willingness to give the party and you will mange it half-heartedly so it will not be lawful for the party-participants to eat. Also by attending the party, they will have a share in the sin committed by the lady,
(4) The teacher will be sinful for stealing your mobile, but since you have taken it knowing that without it your mobile will not be returned, so you will not be guilty of theft.
(5) This habit consists of many evils; therefore it is mandatory to abandon it.
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband
