Bank Key 

Definition

A system object that identifies a bank.

Use

In Poland, you must use the bank number as the bank key so that you can enter the bank number in the correct format.

Customizing

In Customizing for Global Settings, define the bank number as the bank key by choosing Set Countries ® Set Country-Specific Checks. In the Bank Key field, enter 1 (bank number).

Master Data

When you create a bank master record, use the bank number as the bank key.