Editing ATM (section)

=== Device operation integrity ===
[[File:Worn ATM.jpg|thumb|upright|ATMs that are exposed to the outside must be vandal- and weather-resistant.]]
Openings on the customer side of ATMs are often covered by mechanical shutters to prevent tampering with the mechanisms when they are not in use. Alarm sensors are placed inside ATMs and their servicing areas to alert their operators when doors have been opened by unauthorised personnel.

To protect against hackers, ATMs have a built-in firewall. Once the firewall has detected malicious attempts to break into the machine remotely, the firewall locks down the machine.

Rules are usually set by the government or ATM operating body that dictate what happens when integrity systems fail. Depending on the jurisdiction, a bank may or may not be liable when an attempt is made to dispense a customer's money from an ATM and the money either gets outside of the ATM's vault, or was exposed in a non-secure fashion, or they are unable to determine the state of the money after a failed transaction.<ref>{{cite web|url=http://www.kuluttajavirasto.fi/user_nf/default_mag.asp?id=12263&lmf=11440&mode=readdoc&tmf=11440|title=Kilpailu- ja kuluttajavirasto}}</ref> Customers often commented that it is difficult to recover money lost in this way, but this is often complicated by the policies regarding suspicious activities typical of the criminal element.<ref>{{cite web |url=http://moneycentral.msn.com/content/Banking/P57803.asp |title=Banking |publisher=Moneycentral.msn.com |access-date=2011-02-11 |url-status=dead |archive-url=https://web.archive.org/web/20080417111312/http://moneycentral.msn.com/content/Banking/P57803.asp |archive-date=17 April 2008 }}</ref>