Is money earned considered halal if the intern is absent from work with the approval of his manager, who asked him to sign in as present, knowing that training regulations do not allow leave before eight months, and that the person responsible for salaries confirmed no deduction unless the manager mentions the absence in the report?

If the manager is authorized by the employer to grant leave, then there is no harm in the absence, and the salary is lawful. However, if the manager does so on his own initiative without authorization from the employer, then this is not permissible due to the deception and falsehood involved. The wages for those days must be returned to the employer, and it is not permissible to give them away as charity.