What should the questioner do after the printer was damaged and a part of it was lost during its maintenance at the agent, and the agent refused to acknowledge that, knowing that the questioner signed for receiving the printer in working condition, and is he obligated to buy a new printer for the company or pay part of its price?

The agent's statement that he received the printer incomplete contradicts his claim that you received it in working condition, unless the missing part does not affect the printer's operation. Therefore, the employee is liable for the loss of the part if it was due to his transgression or negligence, and this is agreed upon by jurists. Many scholars also hold that a shared employee is liable even if he did not transgress or neglect. Based on this, the liability falls on the agent and not on you. If he claims that he delivered the printer with all its parts complete, you can have him swear an oath in court. If he refuses, you can swear an oath, and he will be compelled to pay the compensation. However, if he swears an oath, the liability falls on you for your negligence in not testing it.