There are no extra financial or administrative requirements for biometric passport holders to fulfil in order to travel freely to the Schengen countries. However, the normal entry conditions for all third-country nationals travelling to the Schengen area apply. At the border, travellers may be asked to show proof of means of subsistence throughout their stay in the Schengen area. Travellers may also be asked to provide evidence of a place to stay (e.g. hotel reservation or address at which they will be staying). In addition, the persons must not be considered to be a threat to public order, public health or internal security and they must not be persons for whom an alert has been issued for the purpose of refusing entry (for example as a result of previous overstay or other reasons).