What is the ruling on a female lawyer pleading and demanding her client's rights based on a hire purchase agreement ending in ownership, and is she sinful for that, or is she merely a party demanding rights?

Leasing leading to ownership has permissible forms and impermissible forms. The form mentioned in the question is impermissible if it is limited to a lease contract through which ownership transfers upon payment of installments. The permissible forms are when the lease contract is accompanied by a promise to sell, or a promise of a gift contingent on the full payment of the rent.

If the contract is permissible, it is permissible for the lawyer to demand the company's rights from the lessee. Likewise, even if the contract is impermissible, the company still has a legitimate right. The lawyer may demand payment of installments or the return of the leased asset in case of inability to pay. It is also permissible to stipulate the termination of the contract for the lessee's failure to pay the rent. However, the lawyer may not demand what is forbidden, such as late payment penalties, maintenance costs not resulting from transgression, or insurance costs that the lessee cannot be compelled to bear. Therefore, contracts must be studied, and only what is religiously permissible should be demanded.