In order to establish the identity or to verify the identity of the person subject to the screening, a verification should be initiated in the in the presence of that person during the screening. During that verification, the biometric data of the person should be checked against the data contained in the . Where the biometric data of a person cannot be used or if a query with those data fails or returns no hits, the query could be carried out with the identity data of the person in combination with travel document data, where such data are available, or with data or information provided by or obtained from the third-country national concerned. In accordance with the principles of necessity and proportionality, and where the query indicates that data on that person are stored in the , Member State authorities should have access to the to consult the identity data, travel document data and biometric data of that person, without the providing any indication as to which EU information system contains the data.