International Bank Account Number (IBAN) - identifier used internationally by financial institutions to uniquely identify the account of a customer.
The format of IBAN allows up to 34 contiguous alphanumeric characters containing the following
consecutive components:
IBAN: CCkk{BBAN}
C = country code, 2 letters as specified by ISO 3166
k = check digit
BBAN = up to 30 alphanumeric characters, 0-9, A-Z (only uppercase), no separators.
Further specifications of the format and content of the IBAN can be found in the standard ISO 13616 "Banking and related financial services - International Bank Account Number (IBAN)" version 1997-10-01, or later revisions. In addition, EPC has more information in it's own knowledge bank: http://www.europeanpaymentscouncil.eu/knowledge_bank_detail.cfm?documents_id=65