Is money earned from registering overtime hours, not all of which were worked, permissible in the public sector?

If the team leader is authorized by the employer to act in such a situation, then there is no harm in benefiting from the money. This can be verified through work regulations or by asking specialists. However, if he does so on his own accord without the employer's permission, and submits falsified reports for overtime hours that were not worked, then this is not permissible for him, and it is not lawful for you to take it. Cooperating with him on this would be considered cooperating in sin and aggression. It is obligatory to adhere to the terms and regulations of the contract.