u need to fill and submit two form viz.
1) form 119 :- it is a request to principle that my articlehsip is over and kindly issue me certificate in form 118.
Form 119 is it to given to your CA , and carbon copy to be given to institite within 15 days after compeletion of articleship. also get the acknowledge from your CA on photocopy of form 119 , for confirmation of receipt.
2) form 108 :- "certificate from your CA as completion of articleship."
for 108 is to be filled in triplicate , one for institute , second for your CA and third for yourself.
form 108 should necessorily be in princliple's handwriting , as it is a certifcate and not jus a form.
Form 108 is to be submitted within 30 days after comeletion of articleship.
And , no attachments are required to be given to institute , only form 119 and form 108.