The auditor needs to sign off that he / she is independent from the company (i.e. that a conflict of interest doesn't exist). If the auditor signs off knowing this is a lie & gets caught, he / she can say bye bye to their CPA license....and if shareholders are damaged because they relied on the audit opinion, the auditor can also say bye bye to their bank account & probably some of their free time too. Have fun hanging out with Bubba in the community showers in jail!