Fictitious names aka trade names aka doing business as aka d/b/a is a thing and it's legal. But generally to be legal it needs to be filed with the state or lo

Fictitious names aka trade names aka doing business as aka d/b/a is a thing and it's legal. But generally to be legal it needs to be filed with the state or local government (or whatever). Some places in the US also require a notice in the newspaper as well.