i dont think u ve to get attested there....coz there is no place for their signature....u can see there are 4 type of forms available on examination website
if you have completed your articleship then you can upload the certificate of service signed by you, you are not required to get the certificate attested by a ca, you can also contact the helpline no. of ICAI 01203054851 for better clarity
for the students who are appearing for nov 2017 exams they have to submit certificate of service for the students who have completed their artilces they have to take signature from principal or any other practising chartered accountant but there is no details regarding principal or practising ca in the form which is provided by icai please clarify me i have completed my artciles in august 2015