Completed Nonimmigrant Visa Application (Form DS 160) which must be completed on-line. The DS-160 is available only on-line at https://ceac.state.gov/genniv/
One passport-type color photograph, but check the website of the U.S. consulate because some U.S. consulates require more than one photo
Passport valid for at least 6 months beyond expiration of L-1 petition (as reflected on I-797 approval notice) or beyond date of visa application
Photocopy of the complete (upper and lower) I-797 Approval Notice from USCIS confirming L-1 petition approval
Complete photocopy of the underlying L-1 petition and supporting documents as filed with USCIS
$150 (U.S.) visa application fee (Canadians are exempt)
Letter from employer confirming employment described in the L-1 petition
Documentation showing prior legal immigration status in the U.S. (e.g., copy of I-94 copy for most recent U.S. stay)
Reciprocity fee sometimes required (depending on country of nationality), see U.S. government website -- http://travel.state.gov/visa/frvi/reciprocity/reciprocity_3272.html
$6 (U.S.) land border crossing document fee for Form I-94 issued upon entry into the United States at the Canada-U.S. or Mexico-U.S. border
Photocopy of the principal applicant's complete (upper and lower) I-797 Approval Notice from USCIS confirming L-1 petition approval
Original documents demonstrating relationship (e.g., original marriage certificate or original birth certificate for children); any document not in English or the language of the country where the application is being made must be translated into English
$150 (U.S.) visa application fee (and Canadians are exempt)
Letter from the principal applicant's employer confirming employment described in the L-1 petition
Copy of principal applicant's L-1 I-94 card (copied both sides) if the principal is present in the U.S. at the time dependent applies for an L-2 visa