If it ends up laying blue/green eggs, it is an Easter egger
Actually that is a hard one to answer.
Not all EEs lay blue or green, some lay brown, tan or light pinkish or cream. Not all EEs have beards and muffs. It depends on what genetics it picked up from its parents. I would say if it had no muffs, beard and didn't lay blue or green could could safely say it isn't an EE.
Since EE is not a recognized breed there are no standards but USUALLY one would expect an EE to have a tail, beard, muffs and lay blue or green eggs. If olive green, they are called Olive Eggers but that isn't a recognized breed either. Generally speaking, an EE would come from 2 EEs, an Ameraucana pairing that didn't come out with APA recognized colors or crossed with something else or an EE crossed with something else. Otherwise the bird wouldn't have the beard and muff genes. Though Faverolles do so I suppose if you crossed a Faverolles with a Cream Legbar or Araucana (for the blue egg gene) MAYBE you would end up with some chicks that are bearded, have muffs and lay blue or green eggs). Maybe it would be a Frankenbird
