Original and valid passport
Valid visa for the country of travel (except where VISA on arrival applies)
Confirmed ticket-showing travel within 60 days of taking foreign exchange
PAN (Form 60/61 in case PAN missing)

Apart from this KYC of sponsoring company would be required as per RBI guidelines for Business Travel

• Upto Rs. 50,000 (per traveler), you can pay in Cash or in any of the following payment modes 
• If the total amount due exceeds Rs. 50,000 you are only allowed to pay using one of the following payment modes: 
• RTGS or NEFT (Subject to clearance)
• Online Payment
• Cheque (Subject to clearance)

Travelers are allowed to purchase foreign currency notes only up to USD 3000 or equivalent. Balance amount can be taken in the form of Prepaid Travel Cards.

Exceptions to this rule are the following: 
(a) travelers proceeding to Iraq and Libya can draw foreign exchange in the form of foreign currency notes and coins not exceeding US$ 5000 or its equivalent 
(b) travelers proceeding to the Islamic Republic of Iran, Russian Federation and other Republics of Commonwealth of Independent States who can draw entire foreign exchange in the form of foreign currency notes or coins. For travelers proceeding for Haj/ Umrah pilgrimage, full amount of BTQ entitlement (USD 250, 000) in cash or up to the cash limit as specified by the Haj Committee of India, may be released by the ADs and FFMCs.

For Private or Business visits abroad, any resident can obtain foreign exchange up to USD 2,50,000 or equivalent in one financial year, irrespective of the number of visits undertaken during the year. No foreign exchange is available for visit to Nepal and/or Bhutan for any purpose.