Is it obligatory to obtain forgiveness from all employers (father and brothers), or is it sufficient to obtain it from the manager authorized to determine and disburse salaries, regarding previous negligence in work?

The benefits of a private employee during official working hours belong to his employer, and he is not permitted to occupy this time with anything other than what he has been assigned. Negligence in work and distraction from it during working hours are considered shortcomings that require repentance. If the general manager is authorized by his partners to waive their rights, then there is no blame upon you if he waives them, and your liability will be cleared thereby. However, if he is not authorized, then his waiver alone is not sufficient for the rest of his partners.