Is money earned from working as an intermediary between a doctor and those seeking a certificate of celibacy unlawful, and does it remain unlawful after becoming aware of the impermissibility of this certificate?

It is not permissible to issue a certificate or assist in its issuance if it contains a Sharia-prohibited element such as lying or forgery, due to the Almighty's saying: "And do not cooperate in sin and aggression." Therefore, the salary from the job is permissible as long as the original work is permissible, and the wage is owned by contract. There is no need to dispose of the money earned from working in the clinic.