The cost to National Australia Bank for a "remediation program" for corporate superannuation customers in relation to "plan service fees" will be A$34.7 million, roughly double the $16.9 million spelled out by NAB on the day of its full year result release in October last year.The compo will be paid to approximately 220,000 customer accounts, with the average compensation amount per customer around $150, the bank's acting executive general manager, for wealth products, Garry Mulcahy said said.NAB also owned up that it will have to take corrective action on wrongly declined life insurance claims, albeit restricted to ten customers.The bank said these customers had claims incorrectly declined and paid $1.8 million "in additional insurance benefits to these customers" covered by MasterKey Business Super and MasterKey Personal Super products.Conduct issues bedevil NAB in other facets of its wealth business, with the corporate regulator forcing NAB's superannuation trustee, NULIS, to commission "an independent Assurance Review into its superannuation business." The Australian Securities and Investments Commission imposed "additional conditions" on the NAB trustee's licence. The conditions require NULIS to engage an ASIC-approved independent expert to assess and report on the adequacy of its compliance and risk management practices for its retail and wrap superannuation funds.External consultants, KPMG, will conduct the review with the first report to be provided to ASIC and the Trustee by July 2017.ASIC said the conditions were imposed on NAB's trustee follow inquiries into a breach reports lodged by NAB's wealth entities. ASIC said the breaches "involved a breakdown in risk management and communication procedures following the transfer in 2012 and 2013 of all members in a number of products to MasterKey … as well as changes made to the death and total and permanent disablement insurance" relating to around 400,000 MasterKey members.