As my client wanted to transfer a domain to Opensrs/Tucows reseller (ev1servers domains fits this), firstly he go IP address blocked messages after filling up the Transfer request form & credit card details.
Then he tried to fillup the Transfer request form by SSH from a US datacenter server, then he got error message Credit card no. wrong.
Same credit card was used to pay a linux server at ev1servers!
So it looks like domain clients have been restricted to US/Canada + maybe Australia.