Once overseas experts are engaged and ESR methodology analysed, Mr Mansfield said the error will become apparent.
Judge Ryan remanded "The Boss" in custody mainly because he was already on bail for similar charges laid in Operation Ark last November, for which the same defence will be argued.
"The Boss" is alleged to have worked closely with a British man, Craig Williams, known as "The Banker", who was living in the Metropolis tower in downtown Auckland.
The pair communicated by using Skype software and encrypted emails, a court has been told, and the police were forced to place a listening device in Williams' apartment to gather evidence.
The police allege 46-year-old Williams used a false passport to transfer $8 million from a foreign exchange outlet to overseas accounts in the 12 months before the arrests.