The critical thing for webmasters to keep in mind is that iBill and other 2 other companies made a joint announcement to the world about this issue over 1 week ago.
Since making this dramatic announcement they have demonstrated zero ability to explain how the changes will be implemented, what effect the changes will have and what measures we, as webmasters, need to take.
It would be wise for everyone to seriously think about how unprepared your respective 3rd party biller has been and consider this when dealing with them in the future.
We, despite losing numerous rebills, decided today to dump iBill over all sites as we have no faith in their ability to provide their services to us in the long term. Although we may lose in the short term our goal is to have relationships with companies who show preparedness to deal with change. iBill scores a big fat zero on this count.
PSW look good to us as does ACPay, whether these companies can continue to service international accounts over time remains to be seen, however at least they are providing answers at the moment - something that iBill, Paycom, Epoch and ccBill just aren't doing well enough.
