Banks may refuse to refund disputed transactions, or help customers who are victims of fraud, if the person in question has their fingerprints stored on a phone or tablet that does not belong to them.

According to a new report, several banks in the U.K. are making the decision now that fingerprints are used to authenticate payments within Apple Pay. Lloyds Bank, for instance, features the following line in its terms and conditions: “If Touch ID is available on your device, you must ensure you only register your own fingerprints (and not anyone else’s).”

HSBC bank told Telegraph Money that, “Our customers’ financial safety and security is of the utmost importance to us, as such we advise all our customers to keep their details as secure as possible. This means not sharing their Pin, or in the case of Apple Pay not letting others access their phone.”

Speaking personally, I only have my own fingerprints saved on my Apple devices, although I imagine things may be a bit different for people with kids, who don’t necessarily own their own iPhones. iPhones allow for up to 10 different fingerprints to be saved by the device.

I’d still be interested to know how banks would find this information, however.