homework

Helping students with their exam papers and homework

Q: We are working on internet from past 4 to 5 weeks. Our clients send us papers to solve when they are in the examination hall then they demand to solve that paper in a given time. This process is done through the phone. After solving questions we send them the answers and then they right it on their paper to pass the exam. They pay us for solving the paper. Is this sort of earning halaal? They also pay us for solving their homework. Is this sort of earning is halaal?