<Li> country code using ISO 3166 - 1 alpha - 2--two letters, </Li> <Li> check digits--two digits, and </Li> <Li> Basic Bank Account Number (BBAN)--up to 30 alphanumeric characters that are country - specific . </Li> <P> The check digits enable a sanity check of the bank account number to confirm its integrity before submitting a transaction . </P>

How many number are in a bank account number