Requirements:

1. Valid Passport good for a minimum of 3 months.

2. Two (2) colored, passport-type photographs (2"x2").

3. Visa application form duly signed and completely filled out.
4. Letter from the foreign (U.S.) firm stating the name and position of the applicant, detailed purpose of trip, and company's compromise to assume full financial responsibility for the traveler expenses, including his return to the country of origin or last country of residence. This letter must be translated into Spanish and both versions (English and Spanish) must be notarized and certified with an APOSTILLE from the secretary of state where it was issued.

5. Proof of legal existence of the U.S. Company or “affidavit”. This is an original "CERTIFICATE OF CORPORATE EXISTENCE", issued by the "SECRETARY OF STATE", from the state in which the company was incorporated. This certificate must be updated (issued within the last six months) and certified with an APOSTILLE from the secretary of state where it was issued.

6. Consular fee: US$200.00, (Exempt for U.S.Citizens).

Note: If you'll stay less than 90 days in Colombia and you are US Citizen, you won't need a visa.  You'll need a business visa only if you want to apply for a "cedula de extranjeria" that allows you to open a bank account or buy or sell properties.