A parliamentary committee has recommended an opt-in function for contactless payment cards, requiring financial institutions to get consent from customers before contactless payment features are activated on their cards.The Parliamentary Joint Committee on Law Enforcement's report on finance related crime said a number of submissions argued that new technology had expanded opportunities for card fraud. The rollout of contactless payment technology was seen as a significant factor.Australians are the biggest users of contactless payments in the world, according to researcher RFi Group, with 70 per cent of all Australians having used it.Victoria Police and banks have been skirmishing over the issue for the past couple of years, with the police claiming that the presence of contactless cards, which do not require a PIN at the point of sale, had encouraged an increase in the number of thefts.The industry has rejected these claims, arguing that the contactless mechanism is not a driver of fraud.Victoria Police went further in its submission to the committee, saying that its attempts to have discussions with banks over prevention strategies were rebuffed.The committee said it shared to concerns of law enforcement agencies that the rollout of new technology without consultation with law enforcement agencies has the potential to become a driver of financial crime.The committee said banks and other financial service providers should consider law enforcement issues more carefully and facilitate discussions with law enforcement about new technologies prior to rollout.