Principal applicant’s employment confirmation letter (original/copy) and end client letter from employer/petitioner.

[KasakRaja]

"Employment Confirmation Letter" and "End Client Letter" same aa For Full-Time guys? 

or need 2 different letters for DropBox/Visa interview? 

if it is 2 different things, provide the sample formats please. 

[Sarvapindi]

Yes

[TensionNahiLeneka]

i guess so . it is same , as both employer and end client are same for you .