A Practice Note discussing the L-1 nonimmigrant visa classification, used by employers to transfer foreign nationals from a related entity abroad to work in the US. This Note describes how a foreign worker can qualify for the L-1A executive or manager or L-1B specialized knowledge classification, how an employer obtains L Blanket certification, the L-1 petition and blanket application process, and how the foreign worker acquires lawful L-1 status.