What is the ruling on money earned from mediating between those seeking female hairdressers from a specific country and girls from the same country who wish to work as female hairdressers in Saudi Arabia, knowing that these girls travel without a mahram and their claims of experience are not verified, and does the same ruling apply to male laborers?

The original ruling on brokerage is permissibility. However, if you know that the female worker will travel without a mahram (unmarriageable kin), then it is not permissible to facilitate her recruitment, as this would be cooperating in sin. As for the matter of verifying experience, that depends on the agreement with the entity requesting the labor. If they stipulate an experience certificate and verification, then their conditions must be adhered to, based on the Almighty's saying: "O you who have believed, fulfill [all] contracts," and the Prophet's (peace be upon him) saying: "Muslims are bound by their conditions." If the entity does not stipulate this and is satisfied with questioning, then there is no objection.