Valid passport with atleast 6 month validity from the date of travel.
2 Photos(Passport size, Camera clicked, latest)
Covering letter on the company letterhead in detail mentioning the designation of the traveller and the name and designation of authorised signatory.
Invitation from Bangladesh with name and designation of the authorised singnatory (Invitation should have the complete address and contact no. of Bangladeshi Company)
Chamber letter of Indian Company.
If Company not the member of any Chambers then applicant to mention the same in Covering Letter and attach Indian Company Registration Certificate (VISA CAN BE TRIED ON THIS).