The auditor of collapsed ASX tech player Big Un has escaped with a $2000 fine and a conviction for failing to comply with audit standards, after charges against the Perth-based 65-year-old were downgraded.

The penalty to be paid by Graham Swan, formerly of boutique Sydney-based accounting practice Rothsay Auditing, falls short of the $10,500 maximum penalty at the time of offending, and is substantially less than the maximum penalty of five years imprisonment and/or a fine of $42,000, which was on the table for his original charge of making a false and misleading statement.