What are the ??????'s extended attributes?
Certain country-code TLDs such as .CA, .COM.AU, .COM.ES, .ES, .FR, .NOM.ES , .NET.AU, .NU, .ORG.AU, .ORG.ES, .SG, .UK, .US, generic TLDs like .XXX ? .NYC require that you provide some additional inf??mation while ?????ing ??????s.
This m?at??y additional inf??mation is called extended attributes. These attributes can be specified explicitly during the checkout (you need to use st?ard ????out instead of Express ????out).
NOTE: ????? attributes f?? .UK ? .XXX ??????s are optional, however, .XXX ??????s without extended attributes wonot w??k c??rectly.