Passport with at least 6 months validity from the date of return travel

1 VISA form per person [available from our office] 

Aadhar Card

Cover letter (Addressed to Bangladesh High Commission, New Delhi) - Explaining purpose, duration, mention previous travel history, Name and address of Bangladesh contact to be mentioned in the cover letter 

Invitation letter from Bangladesh on company letter head in detail stating purpose, dates of visit, name of visitor, name & designation of signatory, company stamp

Recommendation letter from Chamber of Commerce