Eliot Lear wrote: > Ed, > > Forgive me, but you didn't answer my question. I honestly think I did. > How do I tell my credit > card company's billing system which harris.com to use? You tell them -- you have a previous relationship (when you credit was approved). As I exemplified, you tell them to use the harris.com that is resolved from your root -- an IP number. Richard or Stef can tell you how this works for them. > What keeps my > data entry from becoming ambiguous over time? Your actions, just like today -- what happens if you drop your domain name today? Hope this helps. Cheers, Ed Gerck > > > Eliot > > Ed Gerck wrote: > >>How does my credit card company's billing system know which harris.com > >>to transmit my bill to? What unique attributes does it use to choose > >>between the two domains? > > > > > > Eliot, > > > > that's easy. Your credit card company has a previous relationship with > > you and knows which harris.com to transmit to. Possibly, to the harris.com > > defined at your root. In pretty much the same way, btw, that the credit card > > company can disambiguate between you and any other Eliot Lear.