National Australia Bank has reached one preliminary milestone in adhering to undertakings to customers and the corporate regulator in connection with customers in receipt of dodgy financial advice.NAB's wealth arm announced yesterday announced that it had "started proactively writing to customers as part of its 'Customer Response Initiative'."Andrew Hagger, NAB's group executive for wealth, said the bank "would start writing to customers where there may have been financial loss caused by inappropriate advice."NAB is one of five key banks and wealth managers goaded by ASIC to review the quality of planning advice in light of instances of the supply of advice motivated by bonuses for planners.The Australian Securities and Investments Commission, in a media release yesterday, described NAB's actions as part of "a large scale financial advice remediation program."NAB's complementary announcement tried for a business as usual tone, but it's telling that the bank is writing to customers fully one year after ASIC established its 'Wealth Management Project' in October 2014.Appearing before the Senate Economics Legislation Committee yesterday as part of the Budget Estimates process, ASIC's deputy chairman Peter Kell was quizzed by Labor Senator Sam Dastyari on the progress of several investigations, including NAB's efforts mitigate its financial planning scandal.       By co-incidence ASIC and NAB chose that day to announce the start of NAB's large-scale remediation project, to be run by Deloitte as the independent expert along with consumer expert Dimity Smith, and reporting back to ASIC. "It's a formal undertaking with NAB, not an enforceable undertaking within the meaning of ASIC's legislation," Peter Kell, deputy chair for ASIC, told the Senators.Kell added that the arrangement had similar elements to the agreement with CBA "in terms of financial assistance, contacting customers, independent oversight, reporting to ASIC, and reporting publicly."