Kindly help me-a doubt

Dear Fellow CCIs,

Please help me, whether the Audit Firm in which i did my Articleship will give Relieving letter and Experience Certificate in their Letter Head.

Because i need the same for joing one Big BPO Company.  They are not accepting the Confirmatio letter sent by ICAI.

They are requiring mandatorily a Relieving Letter or a Confirmation from the Audit Firm as to the Period worked in their Firm.

It's very urgent.  Please revert.

Sivakumar R