Hi, my name is Stephen, I am an american and I just moved to Lisbon from Amsterdam,N.L.. I am a qualified and experienced Chef and I am hoping to work freelance in Lisbon. I believe they use green receipts (recibos verdes) for that but I was wondering how to go about getting an N.I.F. number (Número de Identificación Fiscal). I was told that I need someone to represent me. Does this have to be a future employer? If i have a letter from a company that wants to use my services would this count? I am in possession of a residency permit from the Netherlands and have an appointment with the S.E.F. to exchange it for a portuguesse one on the 3rd of October. Will they supply me with a N.I.F.?