

RBC
The process is not entirely voice-controlled; before the RBC Mobile app debits the user's checking account and sends the payment, it uses Apple's TouchID for fingerprint authentication.

Monzo
For whatever reason, Monzo discovered that Siri will struggle when asked to send P-to-P payments of less than £10. Its solution was to ask users to refer to the amount in "great british pounds" or "pounds sterling" instead of simply saying "pounds," and to use decimal points for values less than £1.

Square Cash
The feature came in a September 2016 update that also allowed

PayPal
“Simply say, ‘Hey Siri, send Bill $50 using PayPal,’” Colbeci wrote in a blog post, adding: “Voila! One less thing to check off the to-do list this holiday season.”
PayPal has 192 million registered users and the company predicts it will handle more than 17 million P-to-P transactions during December.

N26
N26 sets a limit of 25 euros (US$28) per transaction and up to 100 euros (US$100) per day, which is the standard local ceiling on Near Field Communication-based P-to-P payments, according to N26.
The bank, which has a mobile-first focus, operates in Germany, Austria, France, Greece, Ireland, Italy, Slovakia and Spain.
