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Bank Details 
You can enter any number of bank details for each business partner.
Read programs can be used to import bank master data from an external data medium. For more information, see the Implementation Guide (IMG) under Bank Directory ® Bank Directory Data Transfer.
You can transfer international bank account numbers (IBAN) into the SAP system using BAPIs.
Bank data can be used to uniquely identify the bank and the account in the system.
If the bank referred to does not already exist in the system, you should enter it in the system when you create the bank details.
Furthermore you have the possibility to define international bank account numbers (IBAN) at the bank details. This is an internationally valid ID number for bank details, which consists of a combination of the country key of the bank (ISO code), a two-character check digit and a country-specific account number. The maximum length of the IBAN is 34 alphanumeric characters and varies from country to country.
You can:
· Generate an IBAN for bank details and transfer it to your bank data
· Derive bank details from an IBAN that you know of, and enter the relevant bank details ID

You can recognize that an international bank account number has been defined by the change in color of the icon in the column IBAN in the SAP GUI.
You can also create a validity period for bank details, and carry out a change for bank details. Via the pushbutton Change history you can display the change information for bank details.
