Thanks datktmguy and GoneCrazy for your insights.

I talked to one of my co-worker and it seems he went for stamping (Indian) with the email from his manager where it stated that the company does not provide client letter but confirmed that he worked at the client location.
He had printed that email, but the consulate just took out the that piece of paper during the interview and waved it right in front of his eyes and told him that the email is fake.
All he could do was just stare at the consulate with nothing to say.
Thought I would share his experience, I don't know what I am going to do if the same happens to me.

I will take the email and some confidential emails including my work badge with me as datktmguy suggested and as suggested by GoneCrazy.

At this point I still think its very risky without the client letter.

I would appreciate if you keep them suggestions coming fellow sajha users.

I cant believe there were only 2 suggestion after 256 views.
Had I posted a picture of nepali girl and commented on her, I am sure this thread would be 2 pages long.

I am just looking for your honest opinions and suggestions everyone as I thought this would be the best place to seek help from Nepali friends.

Sincerely,
jaamin!