Yes Kiran. Surely it is unlawful, as you do not have any privilege to use it. It is only provided to use for the communication between client and SAP. Furthermore, if you leave client, they may change the password and you are not longer able to use to access SAP Service Market Place.
You may have to follow the evaluation process of that country. You can check with near by countries, if you are interested. Going to other country and writing examination is not an illegal thing. You can write anywhere in the world, nothing is illegal, as long as you are able to clear the evaluation process of that country.
All the best.
Kind Regards,
Ravi