"The FMA has completed its investigation and determined that the appropriate response that is proportionate to the misconduct in this case is to issue a warning to the individual."
The FMA said no threat was posed to future or existing clients from the man and it was satisfied the incident was a one-off and of a low monetary value.
"The individual's employer has reviewed all relevant files and has identified no other misconduct."
It found the financial adviser made no financial gain from the alleged conduct and the clients suffered no monetary loss and remain insured.
"All of these factors and that the individual co-operated with the FMA during its investigation, led to the decision not to name the individual concerned."
While the FMA was satisfied in this case that the individual considered that the product was appropriate for his clients, by completing and submitting the relevant forms without authority his conduct was nonetheless unacceptable.
The regulator has been taking a closer look at life insurance advisers and in June it released a report raising concerns about a group of around 200 advisers which had high levels of replacement business.
The report which analysed the sales data of New Zealand's 12 main life insurers, found some advisers were likely to have be acting in their own interests by replacing insurance policies to boost commissions or get free overseas trips.