(43)Cross-border correspondent relationships with a third-country’s respondent institution are characterised by their on-going, repetitive nature. Accordingly, Member States, while requiring the adoption of enhanced due diligence measures in this particular context, should take into consideration that correspondent relationships do not include one-off transactions or the mere exchange of messaging capabilities. Moreover, recognising that not all cross-border correspondent banking services present the same level of money laundering and terrorist financing risks, the intensity of the measures laid down in this Directive can be determined by application of the principles of the risk based approach and do not prejudge the level of money laundering and terrorist financing risk presented by the respondent financial institution.