Theft and fraud Contactless technology does not necessarily prevent use of a PIN for authentication of the user, but it is common for low value transactions (bank credit or debit card purchase, or public transport fare payment) not to require a PIN. This may make such cards more likely to be stolen, or used fraudulently by the finder of someone else's lost card. Use abroad Inland data networks quickly convey information between terminals and central banking systems, such that contactless payment limits may be monitored and managed.