Is the salary received by an agricultural engineer who works in a contracting company, where he does not find work suitable for his specialization, and he is absent from work and does not commit to daily clocking in, and asks a colleague to sign in his place, lawful (halal) or unlawful (haram)? And is it permissible to sign on behalf of someone else in this case?

The guiding principle in transactions is the agreed-upon contract and the regulations governing the work. Therefore, anything not stipulated is impermissible, and earning is not lawful except in exchange for actual work hours. Being present in the company without working, with the consent of its owners, is not problematic. Subleasing is permissible if it does not violate the contract. Advising colleagues is obligatory, while being cautious not to be influenced by them. "And whoever fears Allah - He will make for him a way out and will provide for him from where he does not expect."