When a customer adds a postcode / zip code I would like to complete some PHP formatting.
From what I can see there are 3 places were a customer can add an address with a postcode
- My Account Address Book
- OnePage Checkout
For Signup I can see I can override the Mage_Customer_AccountController
For the My Account Address Book I can see I can override the Mage_Customer_AddressController
However For the OnePage Checkout I can seem to find where the logic is for adding an address. Please could someone advise