> How many digits/letters long is it nnn.nnn.nnn-nn A CPF is nationally unique. You also have a RG/RNE which is unique per state. Not too often you get asked

> How many digits/letters long is it nnn.nnn.nnn-nn A CPF is nationally unique. You also have a RG/RNE which is unique per state. Not too often you get asked for this one though.