The identification or verification of identity of persons during border checks at the border crossing point and any consultation of the databases in the context of border surveillance or police checks in the external border area or within the territory by the authorities who referred the person concerned to the screening should be considered as part of the screening and should not be repeated, unless there are special circumstances justifying such repetition. The taking of biometric data for the purpose of both identification or verification of identity and the registration in accordance with the requirements of should take place once as part of the screening.