Employer installing surveillance microphones and cameras in the business

Q: My boss is going for umrah and I have been tasked with managing the business in his absence. While I was away over the weekend he installed a microphone listening device that he connected to the camera system. I understand that cameras are necessary and assist us in the event that customers have queries. I am unhappy with the listening device and feel that it is an invasion of privacy. What happens if I recieve a personal and private call from my wife? Please let me know if it is Islamically correct to use such systems to spy on staff and if I am justified in feeling unhappt about it.

Selling human hair

Q: A fertlizer called amino acid is prepared from the hair of humans, dog or any other animal. So we are planning to buy hair from salons and then sell to this industries who make amino acid from hair. Is it permissible?

Lineage of a child born through marrying one's mahram

Q: If a person married his mahram and children were then born from this relationship, will the nasab (lineage) of the children be established from the father? Likewise, will the ruling be the same in the situation where a person married a woman who was haraam upon him because of hurmat-e-musaaharah, ridaa'at, etc. Also, can mufti saheb please explain if there is any difference in the ruling if the husband knew that she was haraam or didn't know?