By the combined effect of the said averments, the respondent maintained a current account with the appellant, a registered commercial bank. The nature of such relationship has been given recognition in plethora of judicial decisions that it involves a specie of contract with special usages with particular reference to monetary or commercial transactions. Consequently, a banker has a duty under its contract with its customer to exercise reasonable care and skills in carrying out its part with regards to transactions in its contract with its customers. The Banker’s duty to exercise reasonable care and skills stretches over the whole range of banking business within the ambit of the contract with the customer. This duty applies to interpreting, ascertaining and acting in accordance with the instruction of the customer.
– Shuaibu JCA. Diamond Bank v. Mocok (2019)