Registers an external bank account from which a cardholder may deposit funds to their cards, and binds it to the specified cardholder. For security purposes, this generates a one-time passcode (OTP) to the cardholder's registered cellNum.

It is advisable for cardholders to also include the relevant cardId in the reference field of any bank or wire transfer, and to post a trace notification.

Together, these methods ensure the most reliable and timely processing of cardholder deposits to their cards, and they reduce the potential for delays or errors. They also provide for the identification of the card to which funds should be allocated, which may be relevant in the case of a cardholder with more than one card.

Bank or wire transfers that can be verified programatically should appear immediately in the card's ledgerBalance but they are subject to the usual domestic or international bank processing times, and funds won't reflect in the availableBalance until the clearing process has completed (typically up to five days).