People wanting to fully utilize Apple Pay Cash in iOS 11 may have to scan a photo ID, such as a driver's license, according to the latest beta code discovery.

Lines in the seventh iOS 11 beta reference scanning both the front and back of a card, iHelp BR noted on Friday. If an ID can't be verified, people may be blocked from using person-to-person transfers in Messages, though any Cash balance should continue to work with other Apple Pay transactions.

The ID requirement may — primarily or in part — be linked to a minimum age barrier. The exact age limit is unknown, but Apple is presumably concerned about children abusing their parents' bank accounts and/or being lured into scams.

On a basic level, Apple Pay Cash gives users a PayPal-style holding fund, which can be applied to any kind of Apple Pay transaction. It's main purpose, however, is enabling iOS 11's person-to-person transfers. The finished version of iOS 11 is due sometime this fall, most likely next month ahead of the "iPhone 8,", "7s", and "7s Plus."