(81)Investment firms distributing financial instruments, in relation to which information on costs and charges is insufficient, should additionally inform their clients about those costs as well as all the other costs and associated charges relating to the provision of investment services in relation to those financial instruments in order to safeguard clients' rights to full disclosure of costs and charges. This would be the case for investment firms distributing units in collective investment undertakings for which transaction costs have not been provided by for example units in UCITS management company. In such cases, the investment firms should liaise with UCITS management companies to obtain the relevant information.