A joint or shared auditor; a person who audits accounts or examines records alongside another auditor.
Prefix 'co-' (Latin 'cum') + 'auditor' (from Latin 'auditor' meaning 'listener' or 'one who hears'). Modern business/accounting terminology.
In accounting, having a 'coauditor' provides checks and balances—two people auditing together catch more fraud and mistakes than one person alone, which is why it's standard practice for big organizations!
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