Is it permissible to be absent from work and provide proof of a reason different from the real reason to avoid salary deduction, knowing that the real reasons may not have official proof?

It is not permissible for an employee to defraud the employer by issuing unreal documents to justify their absence, as this combines deceit, fraud, and false testimony. The Permanent Committee has issued a fatwa (definition) declaring these certificates to be unlawful, because they are lies and falsehoods, citing the Almighty's saying: "{So avoid the defilement of idols and avoid false speech}" and the Prophet Muhammad's (peace be upon him) saying: «Shall I not inform you of the greatest of the major sins?» - three times - «Associating partners with Allah, and disrespecting parents.» The narrator said: He was reclining and then sat up and said: «And indeed, false speech, and indeed, false testimony.»