Steve Bloor, of Open Resolution, says the Financial Ombudsman is a key defence against unscrupulous banks.
Traded life policies (MPL) has suspended redemptions on its Traded Policies fund "in the interests of existing and future investors".
The pace of regulatory change has left many advisers scared of client contact, according a senior figure at BlackRock.
Fund group CEOs have blamed the impact of the Retail Distribution Review (RDR) for a sharp divergence between UK fund sales and those elsewhere in the world at the start of 2013.
Firms who advised on investments in the failed CF Arch Cru Investment and Diversified funds have been contacting clients asking them if they want a review of the advice ahead of yesterday's deadline to identify investors eligible for redress.
Firms which fail to apply a pragmatic approach to complaints cause problems to escalate unnecessarily, Natalie Ceeney , chief executive of the Financial Ombudsman (FOS) has said.
The Financial Conduct Authority (FCA) has censured money transfer firm Horn Express for failing to safeguard and segregate customer funds.