By adding a specific address to the whitelist, you can prevent any unwanted corrections for that address. The most common reason: A customer provides their suburb instead of the city name. In theory a valid, deliverable address but technically incorrect. This may would cause AddressHero to 'correct' the postal code to match the city, or vice versa.

To add an address on the whitelist go to Settings > Post-Checkout Validation > Skip address validation for specific addresses