The Commerce Commission has recently announced its view that the Credit Contracts and Consumer Finance Act 2003 (CCCFA) may apply to arrangements such as gym memberships. The Commission's announcement states that it has concluded that "gym membership contracts that are paid by instalment and are subject to fees or interest are likely to be consumer credit contracts".
If the Commission's approach towards gym memberships is correct, then it would seem that many other arrangements could also be credit contracts. Any instalment payment option that attracts additional charges (e.g. "instalment fees", "direct debit charges" or similar) would appear to be subject to similar scrutiny from the Commerce Commission.