If this is in reference to Real Estate, you do need a licence. Check out this website for additional information; http://www.dos.ny.gov/licensing/
I hope this answered your question! If you have any further questions, please feel free to contact me by the ways below.
Wishing you all the best,
De Vonte Williamson
Licensed Real Estate Salesperson
Proudly Serving Long Island
Coldwell Banker Residential
"I Stand Behind Getting You Results!