At least one embodiment of the invention relates to the fastening and fitting of a built-in unit on a switchboard, which has a through-opening for this purpose, a collar, which is arranged on the built-in, limiting the action of plugging through the built-in unit, and at least one fixing and clamping device ensuring that the built-in unit is pressed correspondingly against the switchboard. The enhanced cash withdrawal transaction option may include using an ATM to display an initial ATM display. Input to the calculating is the selected summary date and the ALIT database.