To write the SAP certification you have to register yourself for the same. To qualify for the exam you should have either 2 yrs of SAP experience or have attended SAP training from either SAP education or its authorized centers. See the below policy on SAP Certification.
Conditions for Participation in SAPs Consultant Certification Program:
For SAP authorized centers in India check this:
You can do Certification for Seimens or Genovate..These are the two Certification Partner for SAP.
For Class room training you have shell out nearly 3laks rupees where as for online training you have to spend only 164800 Rupees..
Class room training is normally 25days training where as online training is for 200hrs.