If you want to do without in the Magento backend on the mandatory entry of the federal state, can make this relatively simple. It is as always: First know how 🙂
Create a folder (To change any core data and to remain safely update). The structure looks like this:
app/code/local/Mage/Adminhtml/Block/Customer/Edit/Renderer
Here the File
Region.php
clean copy, to be investment (Region.php)here to download but is also in the core area of the Magento installation.
Then, the state in the backend no longer mandatory field.
Used in Magento Version 1.5.1.0 Comments? Additions? Notes? Gladly!
