The xTuple ERP Address Validation package is an extension to xTuple ERP that allows dynamic checking and updating of addresses, typically using web services APIs.
This extension has not yet been formally released (Oct 2018). There
is a pre-release package build in the packages directory. If you
want the latest code, you can build the Updater package yourself.
After the extension has been released you will be able to download the Updater package from GitHub, SourceForge. or xTuple's commercial-downloads
This is typically necessary if you are a developer about to release a new version of the address-verification extension:
Linux$ cd address-verification
Linux$ make
This creates an Updater package in the packages directory.