Many trade credit suppliers have yet to register their security interests with the Personal Property Securities Register, National Credit Insurance (Brokers) believes.NCI collates research on trade credit exposures from its own data. The broker compiles a quarterly index drawn from the records of the number of claims, along with collection activity, credit limit decisions and overdue accounts collated by the firm.Its latest index shows a small decline in business credit stress.The Insolvency and Trustee Service Australia recently said that at June 2013 there were almost four million motor vehicles registered as collateral on the PPSR, while 4.4 million items of commercial property were registeredKirk Cheesman, managing director of NCI, wrote in an email that its comments on PPSR come from NCI's own cross section of client portfolio. "We recently held client presentations in each state on the topic of the PPSA.""We were surprised with the level of attendance. [People] who came along… still not knowing much about the PPSA, nor had [they] done anything about reviewing their credit terms and conditions or registering their security interests."Any changes made to a credit agreement with a customer since the introduction of PPSA, on January 2012, may need to be registered as 'non-transitional' in order to 'perfect' your security interest."