Exam form signature

If you are already pursuing your articleship training then in that case only your principal should sign your examination application.

If u have completed articleship completely then after u sending relevant forms to icai regarding completion of articleship details. Then in turn u will get one letter from icai regarding completion of articleship letter. U have to send photo copy of this letter along with exam form & signature on exam form from any other CA..even if he/she is in employment. So principal signature not required.