Is money acquired from buying a machine with forged payroll documents permissible or forbidden?

Falsifying salary statements and writing incorrect data is considered lying and forgery, and falls under the general meaning of the Prophet's (peace be upon him) saying: "Whoever cheats is not of us." As for the ruling on money earned from working with this machine, it is not unlawful, if the work performed by the machine is permissible in itself. The sin of lying and forgery remains separate from the ruling on earning money.